What are the common symptoms of allergies in dogs and cats?

Most common symptoms of an allergy include itching, scratching, head flapping and excess licking. Often dogs and cats will experience inflammation of their skin and ear and often experience recurrent and chronic secondary skin and ear infections.

If your pet is experiencing environmental allergies, their symptoms may be seasonal, and change throughout the year. If your pet has concurrent or undiagnosed food allergies, which may occur alongside environmental allergies, they may experience gastrointestinal symptoms such as soft stools, diarrhea, increased bowel frequency, and vomiting.