Laminitis In Racehorses: The Silent Career Killer

Winning The Battle Against Laminitis

With more than 50 years of experience as an equine veterinarian and nutritionist, Dr John Kohnke has witnessed the devastating impact of laminitis across racing yards worldwide. From his early days in clinical practice to his current role as a leading equine nutrition specialist, he has tracked this silent career killer through countless stables—a condition so prevalent that research shows 46% of racehorses in early training develop low-grade laminitis during their first month of work.

The statistics, first documented by Linford and colleagues decades ago, remain alarmingly current. Yet what concerns Dr Kohnke most is the knowledge gap that persists in racing yards globally. Trainers push grain rations too quickly, miss the telltale signs of inflammation and fail to recognise that their horses' shuffling gaits and weight-shifting behaviour signal a problem that could derail promising careers.

In the Gulf Cooperation Council region, where extreme heat combines with high-starch feeding practices and demanding synthetic track surfaces, these challenges intensify.

Early detection hinges on recognising subtle changes: growth rings developing at the coronary band, elevated hoof temperatures above 40°C, shortened stride at speed and the characteristic 'sore feet syndrome'—where horses constantly shift weight between front legs. These warning signs, combined with nutritional missteps, such as rapid grain introduction, inadequate biotin and trace minerals, poor-quality protein sources, create the perfect storm for laminar inflammation. Understanding both the symptoms and their nutritional triggers proves essential for prevention.

The Hidden Epidemic In Racing Yards

The condition manifests through what Dr Kohnke terms 'sore feet syndrome', a phrase describing horses constantly shifting weight between front legs to find comfort. "When a horse is standing there, he's going from one foot to the other every couple of minutes, trying to shift weight and get comfortable, particularly in the front legs," he notes.
"One of the earliest signs is probably one of the most common reasons for low-grade laminitis in horses in training, because people start ‘graining them up’ too quickly," Dr Kohnke explains. "If you suddenly bring a horse from a paddock into grain-based feeds, that can be a real problem."

Thoroughbreds face inherent vulnerability due to thin hoof walls and soles. When combined with high-speed training that places up to 11,000lb of pressure on front feet, the risk escalates dramatically. This immense force can cause tearing of the internal laminae, which become inflamed.

Growth rings at the coronary band serve as visible markers, taking approximately 4 weeks to appear. "If the hoof has too much blood and has a growth ring, you'll see a raised, elevated ring around the hoof. It takes about four weeks to start to grow around," Dr Kohnke observes.

Inflammation manifests through shortened stride, particularly noticeable at race speeds. Accompanying symptoms include malodorous diarrhoea and nervous behaviour from hindgut acidosis. Pain response to hoof testers around the toe region provides clinical evidence. Modern technology aids early detection, with infrared thermometers enabling early morning temperature checks.
"Early in the morning, test the hoof temperature. If it's above 40°C, you've got a problem in the hooves," he advises.

Supporting limb laminitis presents a particular danger. Research by Dr O'Grady demonstrated that constant weight loading on one leg can trigger laminitis within 9 minutes. Dr Kohnke recalls severe cases where horses developed acute laminitis following kicks or injury to the legs, with one resulting in its pedal bone shattering within 3 days.

Nutritional Factors Fuelling The Fire

Whilst track surface quality influences concussion, nutritional management emerges as the primary controllable factor. Dr Kohnke identifies three critical elements: rapid grain introduction, inadequate hoof nutrients, and inferior supplement quality.
"If it's a well-maintained synthetic surface, you shouldn't see too much of a problem, provided there's not a lot of grain in the diet quickly. The other factors are a lack of hoof maintenance and nutrients, particularly biotin, calcium, trace minerals like copper, zinc and manganese—that's very important. And good quality protein," he explains.

Protein quality matters as significantly as quantity. Keratin production requires specific amino acids including methionine and lysine, yet many feeds contain adequate crude protein from poor-quality sources lacking these building blocks.

Supplement stability presents an often-overlooked challenge. Unprotected biotin powder reacts with minerals, degrading rapidly. "Most feeds have about 1 month of stability in the biotin because the heat and trace-mineral interactions are damaging. They've got about one month before they start deteriorating in biotin and vitamin potency," Dr Kohnke warns.

Recovery Protocols And Timeline Expectations

Supporting hoof recovery demands multi-faceted intervention combining nutritional support with external therapeutic measures. Stabilised biotin supplementation alongside calcium, zinc, copper and manganese provides foundation for keratin production. Results typically manifest within 2-6 weeks.

Magnetic bell boots worn overnight increase blood flow. "These are bell boots with a magnetic field that hang above the coronary band and increase blood flow. But you only leave them on at night; 12 hours on, 12 hours off," Dr Kohnke describes.

Ice therapy proves invaluable post-exercise. Quality ice boots allow full leg immersion. Swimming immediately after track work offers comprehensive cooling, with Dr Kohnke recalling protocols where every horse completed one lap post-exercise.

Rocker shoes have supplanted traditional heart bar shoes. "Years ago, we used heart bar shoes—bars pressing underneath the foot. They actually sometimes cause more damage than benefit. Rocker shoes are better because they have a pivot, and the horse can become more comfortable," Dr Kohnke reflects.

Recovery timelines vary considerably. Mild cases may return to competitive training within 4-6 weeks. "Very early laminitis—if you cut the grain back and stop progression, you should get a result in 3-4 weeks, up to 6 weeks," Dr Kohnke notes.

Severe cases present far greater challenges. "If it's a severe case and really lame, it could take 3-4 months or longer. Racehorses are the pinnacle of the amount of force on their front feet," Dr Kohnke explains. Monitoring via X-rays or MRIs every 2-3 weeks becomes essential.

Battling Heat And Hard Tracks In The Gulf

The Gulf region's environmental conditions create a 'double whammy' for hoof health. Extreme temperatures prevent effective heat dissipation, whilst hot track surfaces compound the problem.
"You've got the heat, which is a problem. And you've probably got very high-performing horses. The problem is you don't have relief from the heat because even in November, the racing is starting," Dr Kohnke observes.

Hoof temperatures naturally elevate to 42-43 °C during exercise. In high ambient temperatures, this can escalate further. Above 44-47°C, collagen fibres in the tendons sustain damage, weakening structural integrity.

Feeding practices intensify regional risk factors. High-starch diets trigger hindgut acidosis, causing hoof inflammation and fluid loss through diarrhoea. Young horses develop nervous behaviour. "The worst combination is a young horse with an inexperienced rider. You've got a real risk of danger," Dr Kohnke warns.

Smart Prevention For Stronger Hooves

Effective prevention centers on gradual dietary adaptation. Dr Kohnke advocates limiting grain increases to 500g every 4-5 days, allowing horses' hindgut microbiota the 1 month adaptation period required. Early training stages demand patience.

Adequate roughage proves essential, though quality matters. Lucerne alfalfa hay without good abundance of leaves provides fibre but has less nutritional value, whilst excessive protein increases hindgut heat production, exacerbating sweat loss.

Hindgut probiotic supplementation offers protective benefits. "If they start about 7 – 10 days before bringing the horse into work with a good quality probiotic, that will help because it takes a horse naturally up to a month to adapt to high grain starch," Dr Kohnke explains.

Quality hoof supplementation with stabilised biotin formulations completes the preventive approach, demonstrating superior efficacy compared to standard preparations. Pre-conditioning horses before training commencement significantly reduces the incidence of laminitis.

Cooling protocols assume critical importance in Gulf conditions. Immediate post-exercise hosing for five minutes, swimming pools or ice boot applications prevent temperature-related hoof damage. A practical tip involves wrapping hooves in kitchen film during water hosing to prevent excessive moisture absorption that softens soles and skin of the limbs.

The prevalence of low-grade laminitis demands heightened awareness and proactive management. Early detection combined with proper nutritional intervention and environmental management offers pathways to recovery and prevention.

In the demanding GCC racing environment, Dr Kohnke's protocols provide trainers with evidence-based strategies to protect their horses' most vulnerable asset – healthy, strong, protective and functional hooves.
"The astute trainers would know, but I'd go into stables and they wouldn't even know that their horses have laminitis," Dr Kohnke reflects. That knowledge gap remains the greatest challenge facing the industry—one that education and vigilance can bridge to ensure horses reach their competitive potential without sacrificing hoof health.