A training routine is decided by the head trainer, who oversees the training of all the horses and maintains relationships with the 'owners' of the horses. Horses are mostly 'worked' early in the morning before sunrise. For most racehorses (unless they are permanently housed at racecourses) this means being trucked to the nearest racetrack to be ridden. Horses are confined to a stable for the remainder of the day, up to 23 hours.

Horses are naturally foraging animals, who like to constantly and selectively graze for the majority of the day. Being housed in stables prevents horses from expressing their natural behaviours, including socialisation. This constant confinement leads to many abnormal behaviours in racehorses that present out of boredom and frustration. 

Cribbing (wind sucking)

Many horses housed in stables will crib bite. Cribbing is when a horse places their upper teeth on a hard object and sucks in a large amount of air, hence being commonly referred to as wind sucking. Boredom and stress are often the cause of cribbing. Horses that have little mental stimulation throughout the day, such as a racehorse confined to a stable 23 hours a day, are at high risk of developing this behaviour. Cribbing also increases the risk of a horse developing colic and stomach ulcers.

Box walking

Box walking is a repetitive pacing around a stable. This behaviour reflects boredom and frustration in horses that are unable to forage or engage in social behaviour.

A horse box walking in their stall.

Wood chewing

Wood chewing is another behaviour that presents mostly in horses confined to a stable. Horses may wood bite out of boredom or to satisfy their chewing needs due to lack of foraging. Wood chewing can lead to the ingestion of foreign objects, which in turn has the potential to lead to impaction colic, as well as wearing down of teeth.

Weaving

Weaving is when a horse walks in place whilst bobbing their head from side to side. Lack of time spent foraging and visual stimulation have been identified as causes of weaving in horses. Persistent weaving can result in weight loss, dehydration and muscle fatigue.