Merck Manual

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Ear of a dog with food allergy
Ear of a dog with food allergy
Ear of a dog with food allergy

Pinnal pruritus and otitis are commonly seen in dogs with food allergy. This dog demonstrates erythema, alopecia, and lichenification secondary to pruritus and allergic inflammation. Patients may also develop secondary infections of the ear with bacteria or yeast.

Courtesy of the LSU School of Veterinary Medicine Dermatology Service.