Canadian Researchers Survey Vets on How Illness and Injury Affect Horses' Mental State

Researchers at the University of Guelph's Ontario Veterinary College, in Canada, have launched an international survey asking equine vets how they believe illness and injury affect a horse's mental state. The study, led by MSc candidate Alessia Masini under the supervision of Professor Christopher Riley, is grounded in the Five Domains Model, a framework that links an animal's physical health and environment to its likely mental experience. The anonymous survey opened in August 2026 and remains open to vets worldwide until the end of December 2026, asking participants to assign behavioural descriptors and stress ratings to a series of clinical scenarios.

The aim is to find out whether vets generally agree on which behaviours go with which conditions and stress levels. If they do, the findings could feed into practical welfare assessment tools that help vets, and eventually owners, read a horse's probable mental state from what it is doing, rather than relying on obvious signs of distress alone. Pain in horses often shows up as a change in ordinary behaviour long before it becomes visible lameness or injury.

For horse owners and breeders, the underlying message is a useful one regardless of where the research ends up: a horse that becomes unusually aggressive may be in pain rather than simply being difficult, and one that goes quiet and unresponsive may be uncomfortable rather than well behaved. Spotting these shifts early, and raising them with a vet, can bring forward the point at which a problem is treated. Owners can also support the research directly by encouraging their own vets to take part, since the survey takes most participants around ten to fifteen minutes to complete.