Why should I use Nutri-Cal for Cats? Nutri-Cal for Cats is veterinarian recommended to provide quality nutrition. It is extremely palatable and your cat will love it. How do I feed Nutri-Cal for Cats to my pet?Just place the recommended amount of gel on your finger, on the cat’s paw, or mix with food and watch them eat. What does Nutri-Cal for Cats contain? Nutri-Cal for Cats contains Vitamin A, D, E, Phosphorus, Thiamine, Calcium, Manganese, Iodine, Potassium, Iron, Folic Acid, Riboflavin and other essential ingredients.