Dogs and cats affected with Cheyletiella mites can either be intensely itchy or hardly itchy at all. They will frequently get a dry scale along their backs, which can spread to more severe and body-wide scaling. As the infection progresses, the itching becomes more severe. Patchy hair loss can occur due to severe scratching. Some cats may have very few signs other than self-induced hair loss from chewing/pulling out their fur. In humans, Cheyletiella mites cause a red raised rash on the arms, trunk and buttocks that eventually turns into a yellow-crusted area. Human infections usually resolve in 3 weeks if the host animal is treated.

Equine Atopy

Like humans, horses can be allergic to pollens, spores, and other allergens that appear in the environment seasonally, as well as substances found within the barn such as dust, mites, and animal dander. While people tend to respond to these various allergens by sneezing and developing watery eyes, while horses react by getting very itchy skin or developing hives. This leads to constant scratching and chewing which can cause trauma to the skin and extreme discomfort. Generally, symptoms worsen with age and can be controlled, but not eliminated.