The recent spate of racehorse deaths in Santa Anita is not a disaster limited to one racetrack or one state. Racehorses die in all 38 of the USA’s racing states. In fact, racehorses die worldwide, albeit less frequently than in the USA. Deaths are not even limited to flat racing. They occur in steeplechasing, harness racing, cross-country, endurance, and many other horse sports. There may be a number of causes but my research tells me that the bit is one of them.
It is possibly the one cause that is common to all disciplines. Bits throttle horses. Suffocation is notorious for causing sudden death in man. Frustratingly, the only way to confirm this in the horse is to make bit usage optional rather than mandatory. Until this is done, the hypothesis that bits kill horses cannot be tested. Fortunately, there is a solution to this ‘catch 22’ dilemma. Although a rule change cannot be justified on the grounds that the bit is already a proven cause of death, its removal can be justified on the grounds that it is a proven cause of many other serious problems. This evidence alone is reason enough for an update in the rules. Therefore, let’s make the rule change for these reasons. Even if the fatality figures did not decline, racing will still have taken a giant welfare and humanitarian step forward. A decline in the high prevalence of behavioural signs of pain, upper airway obstruction, soft palate suffocation, and “bleeding” will, by themselves, support the continuance of racing’s social licence to operate.
The good news is that the bit is superfluous to horsemanship and a handicap easily removed. The benefits start on day one and bring life-enhancing experiences for both horse and rider. It solves a huge range of horsemanship problems, many of them predisposing to accidents that are potentially fatal. For example, in a long-term study, stumbling was a behavioral sign in a third of 66 bitted horses. By removing the bit, its prevalence was reduced by 68% (Cook and Kibler 2018). In the same group of bitted horses, none of which were racehorses, fear was noted in over two thirds. Removal of the bit reduced its prevalence by 87%.
Currently, the bit is mandated for most horse sports, worldwide. But since 1999, when the first peer-reviewed study of the bit was published, a burgeoning body of published research has found no evidence to justify its use and overwhelming evidence for its removal. The research has initiated a paradigm change for the horse world. In the last twenty years, hundreds of thousands of riders worldwide have chosen to switch their horses from bit to bit-free. They stand witness to the beneficial changes both they and their horses have experienced. These natural experiments, conducted over the past 20 years by riders of all ages and experience, with horses of all types, age, and breed, in most disciplines, and under a wide range of environmental conditions, represent a compelling proof of concept. Horses can be ridden bit-free with a pain-free rein-aid. Not once, in 20 years, has my attention been drawn to a horse-related accident attributed to the horse being bit-free.
As yet only one discipline, in one national federation, has updated its rules to allow bit-free competition. Three rousing cheers for dressage in Holland. The time has come for all disciplines and all countries to follow suit. Racing has nothing to lose and much to gain. For too long we have perpetuated a Bronze Age mistake (Cook 2019). Bitting a horse about to run is akin to muzzling a horse about to eat.
There is no need to ban the bit. A radical improvement in equine welfare and rider safety will be achieved in all horse sports by an update of the rules making bit use optional. Once this is done, as bit-free horses are likely to outperform bitted horses, bits will quietly disappear. In racing, the prevalence of pain-induced behavior, soft palate suffocation, ‘bleeding’ from the lungs, catastrophic breakdowns, and sudden death will, I predict, decline.
The horse’s throat is a crossroads for its digestive and respiratory tracts. Serving two functions, swallowing and breathing, a horse at liberty does this on an either/or basis; it cannot do both at the same time. In the wild, a horse gallops with a closed mouth, sealed lips and a stretched-out head and neck, as can be seen by searching ‘wild horses’ on many a YouTube video. Sadly, the first rules of racing were drawn-up nearly 300 years ago, when this fundamental of equine physiology was not recognized. Most of the subsequently formed horse sport disciplines, from dressage to Pony Club, followed racing’s rules and mandated use of the bit. As a result, during bitted performance, 99% of horses endure the simultaneous activation of two bodily systems whose functions are diametrically opposed. During physical exercise the respiratory system should be the dominant system (flight and fight responses) and only when eating should the digestive system be dominant (salivation and swallowing responses). The trouble is that the bit inappropriately activates the digestive system. Furthermore, bit induced pain engenders nervousness and anxiety. In any horse performing at or close to the upper limits of its physical ability, obstruction of the throat airway adds the noxiousness of suffocation and associated fear.
Further reading (all ‘open access’)
Mellor, D.J. and Beausoleil, N.J. (2017): Equine welfare during exercise: An evaluation of breathing, breathlessness and bridles. Animals. 7, 41
http://www.mdpi.com/2076-2615/7/6/41
Mellor, D.J. (2019a): Equine welfare during exercise 1. Do we have a bit of a problem
https://www.slideshare.net/SAHorse/equine-welfare-during-exercise-do-we-have-a-bit-of-a-problem
Mellor, D.J. (2019b): Equine welfare during exercise 2. Do we have a bit of a problem
https://www.youtube.com/watch?v=rY4yEC7lhco
Cook, W.R. and Kibler, M.L (2018): Behavioural assessment of pain in 66 horses, with and without a bit. Equine Veterinary Education.
https://doi.org/10.1111/eve.12916
Cook, W.R. (2019). Horsemanship’s ‘elephant-in-the-room’ – The bit as a cause of unsolved problems affecting both horse and rider.
Robert Cook is Professor Emeritus, Tufts University, Cummings School of Veterinary Medicine, North Grafton, Massachusetts, USA
Title image: Pond at Pickering Creek Audubon Center, Talbot Co. Photo: Jan Plotczyk