Scratching and biting at the skin – when fleas, ticks and mites are not present – can be the result of food allergies. Over time, cats and dogs can develop allergies to a number of ingredients, such as beef, dairy products wheat and other cereal products. The offending dietary ingredient need not be a new one in the diet. Allergies can develop to foods that have been fed for years but the allergy may develop with a sudden onset. As PurrForm is 100% natural raw meat diet it is less likely that your cat would develop allergies.