08/12/2025
August is one of the hottest months of the year year here in Alberta, which means that we need to be vigilant in spotting signs of heat stress in our horses.
Though prevention of heat related injury is always the best policy through adequate hydration, cool down, and limited exertion, we need to be on the lookout for some tell-tale signs.
Some of the primary symptoms of heat stress are rapid breathing, excessive sweating, dehydration, and muscle weakness. Intervention when these symptoms present themselves is imperative in order to prevent heat stroke. Cooling measures may include moving the horse to a shaded area, encourage drinking, and sponging the horse with cool water. If the heat stress is not addressed, it may progress to heat stroke.
Heat stroke is an emergency that needs to be addressed immediately and may require veterinary intervention. Look out for rapid shallow breathing, re**al temperatures of 104-107 degrees F, rapid heart rate over 60 beats per minute, muscle tremors, lack of coordination, and loss of appetite.
The treatment for this is much the same as it is for heat stress.
Horses working outside, in competition, those with obesity or other metabolic issues, as well as older horses are at higher risk for heat stress and heat stroke. Providing 24/7 access to water, adding electrolytes to feed or water, and providing adequate cool down following exercise are all great ways to help prevent heat stress and heat stroke!