I, like gknight, have a good petco. They have a solid display unit, with abover average sized tanks from what I can tell from other pet stores in town. I get my rats from there (lack of better place to get them from, but if anyone has suggestions, I'm open), and my (big) baby girl gobbles them right up. I've not seen a sickly, dropsey, or flea infested rat yet. Its also a newer store though, <5 years in operation. So that might have something to do with it. My local reptile store doesn't do mammals so they don't have a food supply for me.