Those mysterious symptoms could mean your dog or cat has a food allergy.
Pets can become allergic to protein in food, treats or table scraps.
They can develop skin problems, such as rashes, itchiness, reddened ears and hair loss, or intestinal problems, including vomiting and diarrhea. The symptoms of food allergy can look like those caused by allergies to fleas, plants or pollen. Usually, though, allergies to pollen, plants and fleas show up during the spring and summer. Food allergies can occur any time of year. If your dog or cat does have a food allergy, it can be controlled easily.