Cats often suffer from food intolerances or allergies as their digestive tract is one of their most sensitive organs purina veterinary diets feline ha hypoallergenic is designed to help to alleviate the symptoms of allergies such as itching skin inflammation hair loss or digestive problems allergies can be present from birth or they can develop over time and sometimes it only takes a tiny amount of an allergen in your cats diet for the allergic reaction to occur the recipe of purina ve