Horses Need Protection from Sunburn

As the hours of sunlight increase in spring and summer, pastured horses are exposed to long periods of sunshine. While it isn’t a problem for most equines, strong sun could be a mixed blessing for horses with light-colored coats, as increased exposure to ultraviolet light can cause painful sunburn on spots with minimal hair cover. Muzzles, eyelids, and legs are most likely to burn, as are areas of pink skin under white patches and markings.

There are a number of ways to protect horses from sunburn. Using a lightweight turnout sheet, leg covers, and a fly mask with an extension that covers the muzzle are simple steps. Providing a shady spot in the pasture, such as trees, a run-in shed, or a roofed shelter without walls, will give horses a place to get out of the sun’s heat and light. Keeping horses stabled during the hours of most intense sunlight will also help to avoid problems. Various sunscreen creams are available; owners should choose a type designed for horses.

Kathleen Crandell, Ph.D., nutritionist for Kentucky Equine Research, warns that if a horse consumes certain common pasture weeds, chemical reactions can greatly increase the skin’s sensitivity to sunlight. These plants include buckwheat, St. John’s wort, smartweed, and perennial rye grass, among others. An agricultural extension agent will be able to identify dangerous weeds growing in particular localities. Treatment with tetracycline, some sulfa drugs, and other medications can also make horses more susceptible to reactions from sun exposure.

Preventing sunburn is better than dealing with a horse’s discomfort after the fact. Owners should take precautions against sunburn as the hours of sunlight increase, and should watch all horses for early signs of sun sensitivity.