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Br3nda, Flickr One day your cat is minding her own business, sleeping peacefully atop the laundry basket or terrorizing the dog. The next, it's scratching like mad. Fleas are an obvious suspect, but not the only one. Food allergy is "quite common in cats," Christine Bellezza, a veterinarian and the co-director of the Feline Health Center at Cornell University, tells Paw Nation. Itching is the number-one symptom of food allergies, especially around the face, paws and ears, according to PetPlace.com. Other signs include ear infections, hair loss, and small bumps on the skin. Less commonly, food allergies can also upset a cat's stomach, causing diarrhea or vomiting, says Bellezza. A food ...