Adrian Maguire: the ‘hands-on’ horseman

A brilliant and brave jockey, who had his fair share of misfortune with injuries – a broken neck forced him to retire from race riding – Adrian Maguire is now forging a successful career as a trainer and while laid back in personality, he has plenty to say about the state of racing in his home country.

Lissa Oliver (European Trainer - issue 24 - Winter 2008)

Amanda Perrett - following in her father's footsteps

Guy Harwood trained Dancing Brave, one of the all-time great racehorses. Ten years after the horse’s dramatic Prix de L’Arc de Triomphe victory Harwood handed over the reins of his Coombelands Stables to the eldest of his three daughters. What Amanda Perrett inherited in 1996 was not just a prestigious operation; it was one of the most innovative and best-equipped training establishments that Europe had ever seen.

Sean Magee (European Trainer - issue 24 - Winter 2008)

Stress and the Thoroughbred - a closer look at the loosely-used term

There can be few terms used as loosely by both practical horse people and animal scientists as the term ‘stress’.

Dr Mark Kennedy (European Trainer - issue 24 - Winter 2008)

The challenge of transport - the practical considerations for transporting horses

The after-effects of travel on racehorses has vexed trainers for decades. Short-distance transport of racehorses is, as every trainer knows, almost always of very little consequence. Longer distance transport presents a much greater challenge and months of work and planning can be undone in the course of a few hours.

Des Leadon (European Trainer - issue 24 - Winter 2008)

Italian racing goes on strike and brings Rome to a standstill

Alitalia lives to fly another day thanks to a combination of Italian Prime Minister Silvio Berlusconi’s business acumen, unshakable confidence, negotiation skills tuned finer than the engine of a Boeing 747, and utter persistence in the face of strong opposition from syndicate representatives well beyond the eleventh hour. 

Niki Sweetnam (European Trainer - issue 24 - Winter 2008)

Amino Acid Supplements - the important element of protein

Horses in training are traditionally fed a diet that is high in protein, but it is the amino acid content of the protein-rich ingredients that is the important component.

Dr Catherine Dunnett (European Trainer - issue 24 - Winter 2008)

Picky Eaters - a common problem in horses in training

Poor appetite in horses in training is not uncommon, whether this is a transient problem following racing, or, more regularly, during training in particular horses.

Dr Catherine Dunnett (European Trainer - issue 24 - Winter 2008)

TRM Trainer of the Quarter - François Cottin

The TRM Trainer of the Quarter goes to Francois Cottin with more than €4 million in winnings and €600,000 advantage over Guillaume Macaire, the Chantilly handler is almost certain to be champion French jumps trainer this year.

Katherine Ford (European Trainer - Issue 24 / Winter 2008)

Richard Mandella on the basics that make racing work

Hall of Fame trainer Richard Mandella is not in his tack room office between sets at Del Mar this morning. Instead, the son of a blacksmith is at the end of the long indoor barn, artfully sweeping a rasp across a back hoof of a two-year-old Storm Cat filly. When prompted, he says, simply, “The basics are what make this game work. Believe me, basic horsemanship will hold you in good stead. It's the most important thing. Knowing that a horse is shod as correct as he can be, that the blacksmith's doing a good job You? Embarrassed, he downplays his handiwork. No, I tinker around, that's all. I don't do it every day. And it doesn't make me any better than anybody else.

Frances J Karon
 (14 October 2008 - Issue Number: 10)

Better Talk Now - the multi-millionaire BC winner

It's hard to imagine that Better Talk Now, Graham Motion’s remarkable, late-running nine-year-old gelding, would ever cost his trainer a good nights sleep. After all, Better Talk Now's victory in the 2004 Breeders Cup Turf gave Motion a national presence, one which has only grown as Better Talk Now continues to perform at the highest level of racing with 14 victories in 47 career starts and earnings of more than $4.2 million.

Bill Heller
 (14 October 2008 - Issue Number: 10)

From Good to GREAT - the pain of losing a good horse to another trainer

Losing an under-achieving horse is a reality trainers live with daily. But how do you lose a horse who performs spectacularly in his debut? How do you lose a horse you’ve waited your whole lifetime to train?

Bill Heller
 (14 October 2008 - Issue Number: 10)

The Gate Crew - behind-the-scenes but in full view

On Blue Grass Day in 2008, roughly 26,000 people in the stands went crazy as Visionaire, the last to load into the starting gate, took his place in the lineup. When the doors shut behind him, it was the signal that the feature race of Keeneland’s spring meet was only seconds away, and the crowd cheered, wild with anticipation. Everything fell perfectly into place, and head starter Robert “Spec” Alexander released the field: the shrill clang and sharp burst of the metal gate springing open gets the blood flowing like no other thrill associated with horseracing.

Frances J Karon
 (14 October 2008 - Issue Number 10)

Picky Eaters - a common problem in horses in training

Poor appetite in horses in training is not uncommon, whether this is a transient problem following racing, or, more regularly, during training in particular horses. In some situations, ‘failure to clean up’ may simply be explained by horses being offered more feed than they require and so they are being overfed, whilst in other instances, where it is accompanied with poor condition, the causes may be more complicated. Certainly, physiological mechanisms exist in horses to match energy and nutrient intake to daily requirements and these systems form the basis for self regulation of feed intake in horses in the wild or at grass.

Catherine Dunnett (14 October 2008 - Issue Number: 10)

The Role Vitamins Play in the Diet

Vitamins are a key part of the diet for racehorses and although the clinical signs associated with an overt deficiency or excess of one vitamin or another are rare, we should not presume that the level of vitamins provided in the diet is optimized for performance. Horses are, generally speaking, quite tolerant of sub-clinical deficiency or excess with regards to vitamins, and the margin of acceptable intake to prevent health issues is therefore relatively wide in most cases. However, maintenance of health is a separate issue compared to optimal performance, which is the ultimate target for horses in training.

Catherine Dunnett
 (14 October 2008 - Issue Number: 10)

Palm Meadows - the best training center in the country

By Bill Heller

For all the criticism Frank Stronach has received for turning Gulfstream Park from a racetrack into a casino/concert hall/shopping mall that offers racing, he’s received very little credit for developing the best training center in the country, 49 miles north of Gulfstream in Boynton Beach: Palm Meadows.

What drives appetite?

Owned and operated by Stronach’s Magna Entertainment Corp., Palm Meadows is just off the Florida Turnpike. The immaculate 304-acre facility has received rave reviews from horsemen since it opened in 2003.

“It’s very nice; it’s the best training center in the world,” trainer Dale Romans said. “For one, everything is so new. The racetracks are in good shape. Everything is state of the art. The barns are nice. They’re airy for the horses. The upkeep is great. It’s as good today as it was the day it opened.”

But Palm Meadows has more than just the fine facilities offered to horses and horsemen from November 1st through May 1st. Under Stronach’s direction, the living quarters for exercise riders, hotwalkers and grooms resemble college dorms rather than the rundown slums found on many racetracks’ backstretches.

Four three-story dorm buildings each consist of 52 rooms. Each 12-by-20 foot room has two beds, its own shower, toilet, microwave, refrigerator, heater/air conditioner and storage locker. Each building has a laundry room equipped with three washers and three dryers. In the courtyard, there are two sand volleyball courts and a patio with benches and barbecue grills.

Imagine that: backstretch workers living like human beings.

“That’s Mr. Stronach,” Palm Meadows General Manager Gary Van den Broek said. “He wanted to provide better living facilities for the people who work here. There’s nothing fancy about them, but they’re better than other facilities.”

Just about everything at Palm Meadows is better than other facilities.

“From the creation and design of the training facility to the creation and design of dormitories for the backside help, Frank continues to show a genuine and unique concern for those who play such an important role in this sport,” Gulfstream Park President and General Manager Bill Murphy said.

There are three training surfaces for horses on Palm Meadows’ spacious site: a 100-foot wide, mile-and-an-eighth dirt track, a 176-foot wide, seven-eighths mile turf course and an 80-foot wide, one-mile, L-shape jogging track which borders the main track. The dirt surfaces are similar to the ones at Gulfstream Park. “We have a little less clay content than what Gulfstream has,” Van den Broek said. “We’re here to leg up horses.”

That’s an option that trainers employ. Romans had a 32-horse barn stabled at Palm Meadows as well as a barn at Gulfstream. “So we go back and forth,” Romans said. “Most of the horses here at Palm Meadows are getting ready to run. They’re young horses, not quite there yet.”

Other horses at Palm Meadows already have amassed impressive credentials. Last winter’s 1,100-horse population at Palm Meadows included Hall of Fame trainer Nick Zito’s then-undefeated War Pass, the 2007 Two-Year-Old Champion Colt, as well as an unheralded runner in Rick Dutrow Jr.’s barn named Big Brown, who had won his only start in 2007 by daylight.

Dutrow kept Big Brown at Palm Meadows as he prepared him for this year’s Triple Crown run. “I have about 80 horses in New York, and I talk to my people up there every day,” Dutrow said last spring. “But I’d rather be here with this horse because it’s so much fun. He wants to be here at Palm Meadows.”

Palm Meadows’ configuration may have been one of the reasons why. The barns at Palm Meadows are connected to the main track by a system of horse paths designed so that a horse doesn’t have to walk on pavement to get to the track.

Though Dutrow spent much of the spring denying that Big Brown had ongoing foot problems, the quarter crack he developed before the Belmont Stakes became the hottest story in racing and certainly did nothing to help his chances of becoming the first Triple Crown winner since Affirmed in 1978.

Before the Kentucky Derby, Big Brown’s major works were at Palm Meadows. He breezed five furlongs in 1:00 3/5 – galloping out six in 1:14 2/5 – on April 18th, then five furlongs in :58 3/5 on April 24th nine days prior to the Run for the Roses.

Big Brown’s powerful victory in the Kentucky Derby, and his triumphs in the Preakness and Haskell Stakes, will do nothing to diminish Palm Meadows’ stature.

When Big Brown was eased in the Belmont Stakes in the only loss of his career, the longshot winner who beat him, Zito’s Da’ Tara, had also wintered at Palm Meadows.

The quickly growing list of Palm Meadows’ alumni who have had tremendous success include 2003 Kentucky Derby and Preakness winner Funny Cide, 2004 Belmont Stakes and Travers Stakes winner Birdstone, 2004 Horse of the Year Ghostzapper, 2005 Horse of the Year Saint Liam, 2006 Kentucky Derby winner Barbaro, 2006 Horse of the Year Invasor and 2007 Kentucky Derby winner Street Sense.

Street Sense’s success last year helped propel his trainer Carl Nafzger into the National Museum of Racing and Hall of Fame this summer. Nafzger remains enthusiastic about Palm Meadows. “This training facility is great,” he said. “It’s fantastic. It’s quiet. You can do so much here to train a horse. You’ve got the chute. You’ve got the turf. You can do everything in the world to train a horse. Of course, everybody comes to Florida because of the weather.”

Zito is well aware of the difference in the weather between Florida and New York every winter. “You always say you’re a product of your environment,” he said. “Obviously, this is a great facility. The surface is good. It’s quiet. It’s a good place to train. That’s the main thing.”

Van den Broek defers accolades to his boss: “All of the credit has to go to Mr. Stronach,” he said. “Ninety-nine percent of the facility was his design. We didn’t do a thing until he approved it, anything from the color of the screws to the color of the turf to designing the stalls. Everything. It was all him.”

Among the 66 trainers who were stabled at Palm Meadows last winter in addition to Dutrow, Nafzger, Romans and Zito were Jim Bond, Dominic Galluscio, Stanley Hough, Jimmy Jerkens, Steve Klesaris, Michael Matz, Kiaran McLaughlin, Kenny McPeek, Graham Motion, Angel Penna Jr., Linda Rice, Tom Skiffington, Barclay Tagg, John Terranova, Jimmy Toner, Rick Violette, John Ward and Marty Wolfson.

There are 40 barns at Palm Meadows, each with 36 12-by-12 foot stalls with rubber mats. Every other stall is lined with rubber on the walls. Each barn contains an office, a private restroom, two tack rooms, a second restroom for staff, provisions for a washer, dryer and ice machine and a storage loft for light equipment. Twenty 40-foot-wide sand rings allow horses to roll in for fun. A 55,000 square-foot composing plant processes horse waste into compost.

A three-storey administration/lodging building has an employee lounge, a kitchen and a trainer’s lounge with men’s and women’s locker rooms on the first floor. The second and third floors have 30 fully-furnished, one-bedroom efficiency apartments for trainers and assistant trainers with approximately 480 square feet of living space.

Stall rent is $1,200 per stall for the season; dorm rooms are $500 per room for the season and trainer apartments are $1,000 per room with a six-month lease only.

Training hours are from 6:30 to 11am. with one harrow break at 8:30 a.m. The turf track is available for breezing on Mondays, Wednesdays and Fridays from 10 to 11 a.m., and numbers are limited. The starting gate is available on Sundays, Tuesdays and Thursdays from 7 to 9:30 a.m. Free horse-shuttle transportation is available to Gulfstream Park on race days.

Last spring, Tagg had Triple Crown hopeful Tale of Ekati stabled at Gulfstream Park, but transferred him to Palm Meadows. Romans and many other trainers shuttled horses back and forth. A training facility completely separate from a busy, crowded racetrack is a nice option for any trainer.

Nationalizing the Rulebook - can it be done?

The Autumn 2008 issue of our sister publication European Trainer includes an article on Worldwide Rules, in which Katherine Ford examines European efforts to establish a worldwide ruling system for governing horseracing. When we looked at running the same article in this issue we realized that America had to first look at coordinating their own rules of racing at a national level before joining in the international debate. 
Frances J Karon
 (14 October 2008 - Issue Number: 10)

Treating Joint Degeneration the Drug-Free Way

The Background -
Lameness resulting from joint degeneration or osteoarthritis (OA) is one of the most prevalent diseases affecting horses and the most common reason that vets are called out to competition horses. OA causes inflammation of the joint lining and progressive destruction of articular cartilage that covers the ends of the bones composing a joint. This destruction decreases both the natural shock-absorbing function and the range of motion of the joint, ultimately resulting in lameness in the affected animal.

Conventional treatments for joint disease include reduced or altered exercise regimes, bandaging, the use of anti-inflammatory agents, anti-arthritic drugs, artificial joint fluid and corticosteroids. For many years these treatments have helped to improve the condition of horses’ joints and subsequently helped maintain their overall soundness. Yet the fact is that all of them offer only limited efficacy; some are associated with side effects and the fact that some of them involve the administration of prohibited substances creates a headache for trainers.
New treatment
With these factors in mind, perhaps it’s not surprising that a completely new form of ‘drug-free’ treatment is attracting increasing interest from both the equine vets and trainers. While it’s still early days, its advocates believe that it may, over time, prove to offer a more effective and side-effect free way forward for the management and treatment of equine joint disease.
The new treatment, which is gaining an increasing foothold in the UK, US, Europe, Australia, South Africa and Saudi Arabia, is called an ‘autologous’ treatment because it effectively involves the horse healing itself.
A range of in-depth studies are underway to test the efficacy of autologous therapies and, while not yet conclusive, initial research results and anecdotal evidence are proving encouraging.
The causes
So, let’s examine how it works. Joint cartilage destruction is caused by a number of substances that increase when inflammation occurs in the joint.
Laboratory and clinical research has shown that one of the main substances responsible for cartilage destruction is interleukin 1 (IL-1). A multitude of research has also shown that antibodies produced against this cartilage-destructive substance can have a beneficial effect in arresting cartilage damage. A protein called IL-1RA has proved particularly helpful in this respect.
Treating the problem
The autologous treatment involves harnessing the regenerative and anti-inflammatory properties of the horse’s own blood cells, including IL-1RA to combat the IL-1, and encouraging damaged musco-skeletal tissues to heal. Effectively then the horse heals itself, a huge potential advantage for hard-pressed trainers trying to juggle horses’ treatment regimes around racing commitments.
The treatment involves a veterinary surgeon taking blood from the horse with a special syringe containing specially treated glass beads. The syringe is then incubated for 24 hours during which time white blood cells locate onto the beads and produce the regenerative and anti-inflammatory proteins.
After incubation, the syringe is placed into a special centrifuge to separate the serum from the blood clot and create a solution known as Autologous Conditioned Serum (ACS) – effectively a type of ‘anti-inflammatory soup’ with boosted levels of IL-1RA and other regenerative proteins. The ACS is then decanted into three to five vials for later intra-articular injection by the vet into the affected joints of the horse to reduce inflammation and initiate cartilage healing. Typically, three treatments are recommended for optimum clinical effect whilst the horse remains in training or is rested.
Results
A study published in 2005 and carried out at Colorado State University examined the efficacy of the ACS therapy compared to a control (placebo).
Sixteen horses were involved in the trial. Eight underwent the ACS therapy and the remaining horses were treated using saline solution. The horses were injected with the protein intra-articularly at weekly intervals for one month and then monitored for therapeutic success until day seventy of the trial. Factors measured included lameness, movement in the joint and a determination of the volume of synovial fluid.
The study demonstrated that compared to the control group the horses treated with the new therapy showed improvement in lameness and swelling.
Further examination histologically showed that there were also significant reductions in cartilage erosion with the ACS therapy compared to the control group.
The ACS process also encouraged the concentration of IL-1RA, the protein that promotes healing, to increase in the affected joints until day 70 showing that the benefit of the treatment is not short-lived.
Veterinary surgeon Dr. Thomas Weinberger, Müggenhausen, Germany, who led the study, commented: “The arthrosis study clearly demonstrates that the ACS Therapy is an efficient and safe alternative to common therapeutic interventions.”
The late Prix d’Amerique winner and world record trotter Victory Tilly is known to have undergone the treatment successfully.
The experience so far
So, what do equine vets make of this revolution? Consultant Equine Surgeon Cedric Chan BVSc CertES(Orth) DiplECVS MRCVS says the results he’s experienced so far have been encouraging but it’s too early for definitive conclusions.
A RCVS and European Recognised Specialist in Equine Surgery, who runs NW Equine Referrals, UK and France, based in England, Chan says: “I became interested in the therapy as a new physiological form of joint treatment for OA after attending a lecture by Professor Wayne McIlwraith and also using it at one of my referral centers in France, which was using it based on Orthogen’s (the company which first developed the treatment) experience.”
He has, in particular, used the treatment after arthroscopic surgery where OA had been demonstrated.
Neal Ashton, BVet Med Cert EP Cert ES (ST) MRCVS, shares Cedric Chan’s views: “The Autologous Conditioned Serum is now regularly considered at Oakham as an option for intra-articular joint disease in a range of joints. It’s proved particularly effective in treating horses which have been non-responsive to steroids.”
Ashton treats a high percentage of competition horses which are competed regularly and cites a key advantage of ACS as its flexibility when fitting in treatment around events. “Certainly trainers and riders seem to understand and are attracted by the concept of the horse healing itself,” he comments.
Andy Bathe MA, VetMB, DipECVS, DEO, MRCVS, Head of the Equine Sports Injuries Clinic at Rossdale & Partners (Newmarket, England) and another user, says: “I was the first user of the new therapy in the UK. Over the last eighteen months we’ve been pleased with the usefulness of this product in treating our practice population of racing Thoroughbreds, as well as on our referral population of a broader range of horses.
“We’ve found it helpful in the management of traumatic joint disease in racing Thoroughbreds, which have only been partially responsive to corticosteroids.
We’ve had some noticeable successes in helping high quality horses achieve the kind of success they deserve. We have also found beneficial effects in soft tissue injuries such as tendon and ligament injuries. It’s a very exciting technology and one which certainly adds to our armory when trying to treat injuries in these athletic horses.”
Lanark-based Clyde Vet Group recently treated the first horse in Scotland and Andrew McDiarmid BVM&S, Cert ES (Orth), MRCVS, head of the practice’s equine division, says: “While the use of this treatment is in its early stages, preliminary results are encouraging and it is definitely an exciting addition to our therapeutic range of treatments in the management of equine lameness. It represents new territory for equine vets and may herald the start of a completely new direction in treating joint disease.
At the moment, we, like other clinics, are primarily using it to treat cases that have not responded to conventional therapies.”
So, what’s the conclusion so far? “At its best, the therapy has proved extremely effective,” says Neal Ashton. “While it hasn’t worked in every case, I’ve treated racehorses which have gone on to win races and eventers which have got round Badminton and Burghley – something they would have struggled to do the year before.
ACS has a well-deserved place in our toolkit of treatments for joint disease.”
With more research indeed planned and in-depth studies underway, the development of autologous therapies could well be a key area to watch for 2008.

Howard Wilder (14 October 2008 - Issue 10) ​

The Equine Larynx – on a Knife Edge!

Men have been interfering with the equine larynx for centuries, but so far with only limited success. When a horse is heard to be making a noise for the first time, it is of serious concern. Sometimes the concern is only short lived as the horse may be unfit, have a mild respiratory infection or perhaps a sore throat. However, on other occasions the equine athlete in question is on the verge of being diagnosed with a problem that will limit its performance for the rest of its life.

The equine athlete is anatomically designed on a knife edge in so many ways. Firstly, rather than having five digits like a human, the horse is precariously balanced on the equivalent of our middle finger. Add to this the obscure meandering anatomy of the horse’s gut leading to regular occurrences of painful and life-threatening colic episodes, and it is easy to get a sense of just how the thoroughbred has been built for athletic ability rather than soundness – the horse’s respiratory system is no exception. The horse has a massive, powerful cardio-respiratory system but unfortunately air is inhaled and exhaled through a small unreliable larynx and a rather narrow complex nasal system, especially considering that the horse is an obligate nasal breather and thus does not receive any air through its mouth. It is for this reason that any abnormality in the upper respiratory tract of the horse causes a reduction in the amount of oxygen it receives. Clearly, the result of this is an adverse effect on performance.
When faced with a horse that makes a respiratory noise we have a few diagnostic tools at our disposal. Firstly, and perhaps most importantly, we must analyze the noise that the horse is making at exercise. Is the noise inspiratory (when the horse is breathing in) or expiratory (when the horse is breathing out), or are there both excess inspiratory and expiratory breathing sounds? Also, the noise must be accurately described as certain noises are characteristic of certain abnormalities. For example, an inspiratory ‘whistle’ or ‘roar’ made all the way up the canter often indicates laryngeal hemiplegia (paralysis of the left side of the larynx), whereas an expiratory ‘gurgling’ or ‘choking’ sound whilst the horse is at peak exercise or pulling up at the top of the canter usually indicates dorsal displacement of the soft palate.
Young, unfit horses coming into training for the first time often sound ‘thick’ in their wind and can also make an expiratory gurgle when pulling up at the top of the gallop, especially if they have a sore throat (pharyngitis). This condition is essentially inflammation of the pharynx characterized by enlarged white spots (lymphoid follicular hyperplasia). It is a condition that is easily diagnosed by endoscopic examination and will affect almost all horses at some stage and is present in nearly one hundred percent of horses in training under two years of age. The exact cause is unknown but it is probably initiated by challenge to the young horse’s immune system. It is not a serious condition and it usually self-resolves with time. However, when it is causing problems, various treatments may be attempted including anti-inflammatories, antibiotics and immuno-stimulants.
Endoscopy is a crucial diagnostic aid; however, it can have its limitations when carried out in a horse at rest. If the horse has a respiratory infection, pharyngitis or an obviously paralyzed larynx then endoscopy is an excellent diagnostic aid, but in other cases scoping a horse at rest can provide little in the way of information as to why the horse is making such a noise. For this reason, equine veterinary medicine has looked to more advanced technology for assistance. The idea of ‘scoping’ horses on a treadmill whilst galloping came first. Whilst this certainly has obvious merits it does come with some downsides such as the question of whether a treadmill truly represents an equivocal test to a gallop or race and the surface on which the horse has to gallop. In fact, many of the treadmills around the country are currently not in use as too many injuries have occurred. There is now a new idea of fixing a scope in the horse’s nostril, which stays in place whilst the horse canters or gallops. It transmits a signal that can be viewed on a monitor and so we could see exactly what the horse’s larynx was doing as it makes the noise. As yet only a prototype of this ‘over-ground’ endoscope exists but could this be the future of accurate diagnosis of equine wind problems?
By far the most common condition that causes an abnormal inspiratory sound, and possibly the most common cause of any abnormal respiratory sound in the thoroughbred racehorse, is idiopathic left laryngeal hemiplegia (paralysis of the left side of the larynx). This condition is caused by degeneration of the nerve that supplies the left side of the larynx so that that it ‘hangs’ into midline causing an inspiratory ‘whistling’ or ‘roaring’ sound during cantering or galloping and thus obstructing airflow to the lungs. The cause of this nervous degeneration is not known but this again leads me onto yet another poor anatomical design point of the horse. The right laryngeal nerve has a simple route, branching off from the vagus nerve (which comes from the brain) travelling directly to the larynx. However, God decided that the left laryngeal nerve shouldn’t have it so easy and instead it must travel all the way to the heart, where it wraps around a large pulsing artery, before coming all the way back to the larynx. The left laryngeal nerve is also the longest nerve in the body and so it stands to reason that it is commonly damaged and perhaps unsurprisingly, there is also data to suggest that the bigger the horse, the greater its chance of developing laryngeal hemiplegia.
This disorder is not desirable for a number of reasons, not least the fact that it is a progressive disease and hence a small problem in a two-year-old can rapidly become a huge problem in a three-year-old. Nevertheless, surgical treatment is commonly attempted and there are three main operations. A ‘Hobday’ operation refers to the removal of a large portion of the left side of the larynx and thus theoretically reduces the amount of respiratory obstruction. However, many veterinary surgeons argue that although this may alleviate the noise (as the left vocal cord has been removed) it struggles to reduce the obstruction significantly and hence they prefer the ‘tie-back’ operation. Here, the larynx is permanently tied open and so the obstruction should be alleviated. However, things are never so simple in wind surgery and occasionally the larynx can end up in a mess if things do not go well, for example, the stitch breaks down. Hence, the last resort is to insert a permanent metal tube into the horse’s throat through which it can breathe, by bypassing the larynx altogether. This can also be very messy and it is not easy to keep the tube clean, however, Party Politics did win a Grand National with a tube in his windpipe!
Perhaps the most common cause of an expiratory ‘gurgling’ sound is dorsal displacement of the soft palate. During normal breathing, the soft palate sits in front of the larynx just below the epiglottis allowing maximal airflow through the larynx. During eating on the other hand, the soft palate rises above the larynx, directing food into the food pipe rather than the windpipe. What happens in this condition is that the soft palate rises up during exercise thus blocking airflow and often causing an expiratory gurgling or choking sound. Although the clinical signs of this problem are quite characteristic, confirmation of the diagnosis can be difficult as the larynx often looks normal at rest and thus the use of a treadmill or over-ground endoscope may be necessary for an absolute diagnosis.
There are many possible treatments for soft palate displacement, probably because none of them are one hundred percent effective. Starting with the simple solutions, if there is respiratory infection, it should be treated. Next, if the horse is unfit, it should be trained further before considering anything more radical. Then various items of tack can be tried – these include a cross-noseband, a tongue-tie, a spoon-bit, a ring-bit or an Australian noseband. If none of these treatments works then surgery is often attempted. There are a number of possible operations but two are more commonly carried out than the rest – soft palate cautery and the ‘tie-forward’ operation. This is because most soft palate operations are approximately 60% effective; therefore the easiest operation with the shortest layoff is usually tried first. The soft palate can be cauterized with a hot iron to make the palate firmer so that it does not displace during breathing. This may sound a little unsophisticated and slightly barbaric but it is very easy to do, it hardly interrupts the horse’s training and it can make a large difference in some horses, although it often has to be repeated. The second most commonly carried out operation, the ‘tie-forward’, tackles the problem from a different angle. Here, the larynx is manually tied forward with steel stitches, which reduces the amount of soft palate that is available to rise up and block the airway. Some horses have performed much better after such an operation and examples include Royal Auclair, who had his best season following the surgery culminating in finishing fourth in the Cheltenham Gold Cup and second in the Aintree Grand National.
There is a piece of tack that acts in a similar way to the tie-forward operation called the ‘Cornell Collar’ or throat support device. Researchers at Cornell University in the state of New York believe that a deficit in one particular muscle contributes to soft palate displacement and the device intends to mimic the effect of this muscle.
However, although it is in use in some American states, Canada, Australia and Hong Kong, it is banned by most racing authorities including most of Europe. There may be many reasons for this but perhaps the main one is the possibility of cheating as unlike an operation the tack is not permanent and so it could be fitted correctly one day and deliberately incorrectly another day.
Another common upper respiratory condition is epiglottic entrapment or aryepiglottic fold entrapment as it is sometimes known. The epiglottis is the tongue-like structure that should sit in front of the larynx. However, the epiglottis can become enveloped by a mucosal fold and so it becomes trapped in front of the larynx causing a partial obstruction. This usually results in a gurgling or choking sound that may be inspiratory or expiratory. The cause is not completely understood but diagnosis can be made relatively easily at rest if the horse has an ulcerated epiglottis representing the regularity with which the horse entraps its epiglottis, or alternatively a treadmill or over-ground scope could be used to visualize the horse entrapping at exercise. Treatment again involves checking for infection and using different tack, however, surgery can often be successful, at least in the short term, by cutting the mucosal fold and thereby preventing the epiglottis from becoming entrapped.
No discussion of equine wind problems would be complete without at least touching on respiratory infections. Respiratory infections can predispose horses to many of the conditions mentioned above but they can also target the larynx itself. Such laryngeal infections must be treated quickly and aggressively as any scarring or permanent damage to these important structures can leave the horse with a significant problem for the rest of
its life. The cause of laryngeal infections is not fully understood. Some have suggested that kick-back may cause damage to the horse’s larynx, which then becomes infected. However, if this were true then we should expect an increased incidence of laryngeal infections associated with dirt racing due to the large amount of kick-back, an idea that has no statistical evidence to support it.
In summary, the horse’s larynx is a complex topic and I have only succeeded in scraping the surface of a very large subject. There are essentially two major obstacles that so often cause us to fail in its treatment. Firstly, we are not always certain about a horse’s specific problem as we cannot scope it in the final furlong of a race. Secondly, even when we know what the problem is, the area is so delicate and there is so little margin for error that surgery fails to improve equine wind issues with alarming regularity.

James Tate BVMS MRCVS 
(14 October 2008 - Issue 10)

Is conformation in racehorses relevant?

The 2008 yearling sales have begun! Thousands of blue-blooded Thoroughbreds will have their conformation analyzed by trainers, owners and those conformation experts – bloodstock agents. Each catalogue is promoted with photographs of the current superstars sold at last year’s sale. However, does examining a horse’s conformation really give you a better idea as to whether you are looking at next year’s superstar?

James Tate BVMS MRCVS (European Trainer - issue 23 - Autumn 2008)

Comparing cold therapies and their uses in Racehorses

How do commercial cooling systems compare with the more traditional cooling methods? In recent years there has been an introduction of therapeutic cooling systems combining cold therapy with compression to produce a rapid reduction of soft tissue swelling in new injuries and therefore faster recovery times for many types of leg injuries. 

Nicole Rossa PG Dip. (European Trainer - issue 23 - Autumn 2008)