Hill's Prescription foods are just that - available only by prescription or thru your vet. Myndi just started on the canine K/D and I thought I would be able to find it cheaper on line than thru my vet, but soon found out that won't happen. I can get DRY K/D on line with a prescription from my vet for it, but Myndi will only eat canned, and I can't find that on line at all. So I have to buy it thru my vet. Pricey - but my girl is worth it!