The Vitals: Know Your

By Colleen Scott

A horse’s vital signs offer early clues into his overall health. Get to know your horse’s main vital signs and practice taking them. The earlier a potential issue is identified the better the chances for responding and preventing a larger issue from developing.

Temperature: 99 to 101.5 F option but can be more challenging to read and aren’t readily available for purchase. The benefit is no batteries are required. With either model, you can attach a string to the end and clip it to the horse’s tail to avoid it getting lost.

Like humans, horses are individuals and may have a slightly higher or lower resting temperature and it may vary with ambient temperature and exercise. Therefore, knowing your horse’s baseline is essential.

Take and record the horse’s temperature several times a month to establish what is “normal.” Exercise and weather can create fluctuations. Measure while the horse is at rest, after work, and in other common scenarios.

How to measure: Use a rectal thermometer and lubricant. Digital thermometers are available at local drug stores, tack stores, and farm supply stores. The inexpensive thermometer provides easy reading but requires batteries, which can be sensitive to cold weather. Check and change batteries as needed.

What it means: A slightly elevated temperature can suggest a horse is fighting a mild infection or having an inflammatory reaction that could be the equivalent of a cold in humans. A mild fever after vaccination can be normal and just shows that the immune system is responding. Mild fevers can just be monitored while watching for any other clinical signs. If the fever persists and the horse stops eating, consult with a veterinarian about treatment with cold hosing or an NSAID.

“Bringing the fever down can help the horse resume eating and drinking but it’s important to remember that fevers have a purpose in terms of fighting infection so we don’t want to just mask them with drugs,” said Sarah Reuss, VMD, DACVIM, Equine Technical Manager, Boehringer Ingelheim.

Fevers that climb to 105 F or greater could suggest several different infections from Equine Herpesvirus to Potomac Horse Fever, influenza, etc.

Mercury thermometers are another