A top pick from veterinarians and nutritionists, Hill's Science Diet is formulated with rigorous research and offers targeted options for weight, age, and health conditions. Consistently mentioned alongside Purina as the gold standard.
Hill's is what vets reach for when a cat has a specific health issue. If your vet told you to change your cat's diet, this is almost certainly what they had in mind.
“The generally accepted best though tends to be Hills and Purina Pro Plan, both of which offer wet and dry food, as well as a weight management”