Purina Pro Plan Veterinary Diets OM Overweight Management Feline Formula Dry Cat Food delivers a diet-friendly cat food that is low in fat and calories yet high in fiber and protein. This highly palatable food has been designed for cats that suffer from obesity, constipation, fiber responsive colitis, hyperlipidemia, and diabetes. The formula provides balanced nutrition for safe and effective weight loss. It offers dietary benefits that provide optimal nutrition while meeting your adult cat’s special needs.