Food Allergy

Ingredients in some pet foods may cause an allergic reaction in hypersensitive cats and dogs. Reactions are characterized by itching and/or gastrointestinal disorders, and are usually responses to a protein or carbohydrate source in the diet. Food allergies are the third most common cause of itching, and account for about 10 to 15 percent of all allergic skin diseases in canines.

Hot Spots

Hot spots start when a dog incessantly licks, chews or scratches a focal area of the body in response to a painful or itchy sensation. The result is a rapidly developing area of redness, hairloss, oozing and eroded skin that is often painful and infected with bacteria. Hot spots occur most frequently on the trunk, base of the tail, outer thigh, neck or face.


Panniculitis often appears as deep nodules that can occur singly or affect multiple areas of the body.  The nodules can be firm or soft and mobile.  The lesions can eventually become cystic and ulcerate, often draining an oily, yellowish-brown to bloody discharge.


Localized, multifocal or generalized areas of hairless, pimples, red bumps, and crusts are most commonly seen with a superficial bacterial pyoderma.


The fungal skin disease dermatophytosis has come to be called ringworm because of the appearance of the skin lesion that characteristically occurs with this disorder: a circular area of hair loss with a red, raised outer rim. These lesions result from an inflammatory reaction to the fungus. Most often, dogs and cats are infected by the Microsporum canis fungus, but other types of fungi cause ringworm infections as well.