What Are the Treatments for Horses with Mite Bites?

Several species of mites are known to cause a skin condition in horses that is commonly referred to as mange. Sarcoptic mites are the most contagious and can affect any part of the body. Chorioptic mites tend to affect the legs, knees and feet. This type of mange is thought to be more prevalent in horses--such as draft breeds--that have "feathers" on their legs. Psoroptic mites prefer the skin near the mane and tail. Psoroptic mites are rare in the United States, as are Demodectic mites.

  1. Detection of Mites

    • If you notice your horse scratching, licking or rubbing specific areas, that is a major clue that he may be infested with mites. Your horse will also appear irritated, and his scratching and biting may make the condition worse. You may also notice scabs and dry, cracked skin; oozing and inflammation may also appear. Lesions may appear on the head, neck and shoulder and depending on the type of mange, can spread to other parts of the body as well. Ear mites manifest in the ears. Daily grooming will help you notice symptoms early before the infestation gets out of control. Severe mange can result in weakness and weight loss. Mites are very difficult to see without a microscope. If you suspect mites, your vet can confirm via a skin scrape and examination under a microscope. Mites spread from horse to horse, so if you find your horse has mites do not share his tack or other equipment with other animals.

    Treatment

    • For specific types of mange, topical insecticides or lime-sulfur solution will help clear up the condition. Consult your vet on how and when to apply treatment, but a general plan is to treat the horse at 12-day intervals, at least three or four times, according to The Merck Veterinary Manual. Some wormers, such as ivermectin or moxidectin, can also be helpful. Loose skin that has been affected may have to be removed. All animals with mange and those who have come in contact with infected horses should be treated. Isolate a mange-stricken horse from the rest of the herd.