Ask a professional veterinarian
If you can not take the decision as to which brand of dry food is best for your cat, it may be useful to ask the vet for advice. This is especially true if you suspect your cat has a food allergy. A veterinarian can test your pet for allergy and then recommend a food that will be both nutritious and allergy-free cat.
Choose a food that your pet will love
If your cat has a preference in taste, look for food in individual flavors. If your cat likes to eat the food is a good indication you are getting the nutrients it needs from food.