We looked everywhere for a vet that would order Hill’s Prescription Diet for our diabetic dog, and many refused because we were not their client, or would sell small 10lb bags for a heavily inflated price of almost 30 dollars. 10lbs for our dog was gone in about a week! However, Petsmart carries almost all of the Hill’s Prescription Diet varieties and sells them in bulk (20 and 40 pound bags) for a price MUCH cheaper than any vet can offer! They will even give you a “vet card” with your dog’s prescription on that allows you to come back any time and buy more food without having to get another prescription from your vet. Really great service too. Highly recommended!