Equine is the adjective used to describe anything relating to horses and the broader horse family — the Equidae. Derived from the Latin equinus (“of or pertaining to a horse”), the word is used across veterinary medicine, equestrian sport, biology, and everyday horse keeping to describe species, conditions, procedures, disciplines, and attributes specific to horses, donkeys, mules, zebras, and their relatives.
The Equidae Family
The family Equidae contains the genus Equus, which includes all living equines. The principal members are:
- Horses (Equus ferus caballus): The domestic horse, selectively bred over millennia into hundreds of distinct breeds, from the Thoroughbred to the Shire, the Arabian to the Shetland pony.
- Donkeys (Equus africanus asinus): Domesticated from the African wild ass, donkeys are used as working animals across much of the world. Their braying and distinctly different hoof shape set them apart from horses anatomically, though they share fundamental equine physiology.
- Zebras: Three species — plains, mountain, and Grévy’s — all striped and essentially undomesticated, though biologically equine. Their temperament makes them unsuitable for the same level of human partnership that horses achieve.
- Mules and hinnies: Hybrid offspring of horses and donkeys. A mule is a horse mare × donkey stallion cross; a hinny is the reverse. Both are typically sterile, inheriting characteristics of both parent species.
Equine in Veterinary Medicine
The term “equine” is used most precisely and frequently in veterinary contexts. Equine veterinary medicine is a specialised field, distinct from small animal or farm animal practice, with its own specialist qualification pathway, professional body (BEVA — the British Equine Veterinary Association), and clinical challenges. Equine vets treat a wide range of conditions including musculoskeletal injuries, respiratory disease, colic, reproductive issues, dental problems, and neurological conditions.
Common phrases you will encounter include: equine examination (a clinical assessment of a horse’s health status), equine surgery (procedures from routine castration to complex orthopaedic interventions), and equine nutrition (the science of feeding horses correctly for their workload, age, and condition).
Equine in Sport and Equitation
Equine sport encompasses the full spectrum of competitive and recreational horse riding. The FEI (Fédération Equestre Internationale) governs equine sport internationally across eight Olympic and non-Olympic disciplines, including dressage, show jumping, eventing, endurance, and vaulting. The British Horse Society (BHS) oversees equine welfare, education, and access in the UK.
Equine behaviour — the study of how horses think, communicate, and respond to stimuli — has grown into a recognised discipline in its own right, informing training methods, welfare assessment, and the management of horses in domestic and competition environments. Understanding equine psychology is increasingly considered as important as physical horsemanship.
Equine Welfare and Legislation
In the UK, equine welfare is protected under the Animal Welfare Act 2006, which requires owners and those responsible for horses to take reasonable steps to meet the animal’s Five Welfare Needs: a suitable environment, a suitable diet, the ability to exhibit normal behaviour patterns, the ability to be housed with or apart from other animals (as appropriate), and protection from pain, suffering, injury, and disease. The BHS and World Horse Welfare both run active campaigns to improve standards and combat neglect.
Frequently Asked Questions
What is the difference between equine and equestrian?
Equine relates to the animal — the horse or horse family member itself. Equestrian relates to riding or horsemanship — the human activity. Equine medicine treats the horse; equestrian sport involves riders. A horse has equine anatomy; a rider has equestrian skill. The two terms are sometimes used loosely as synonyms but have distinct meanings in precise usage.
Are donkeys and mules considered equine?
Yes. Both fall within the Equidae family and genus Equus. They share the fundamental characteristics of equine physiology — hooves, a single toe per limb, a digestive system adapted to fibrous grasses, and the social herd structure that defines the family. A donkey specialist is still practising equine veterinary medicine, even though a donkey is not a horse.
What does “equine-assisted” mean in a therapeutic context?
Equine-assisted therapy (EAT) and equine-assisted learning (EAL) are structured programmes in which horses are used as partners in therapeutic or educational settings. The horse’s sensitivity to human emotional states and the physical and cognitive demands of horsemanship make equine-assisted approaches effective for a range of clients, including those with autism, PTSD, anxiety, and physical disabilities. These programmes are distinct from general riding instruction and are facilitated by qualified practitioners working alongside mental health professionals or educators.