I work at Petco so I have to say them. I can't speak for ones in other areas but the animals seem well-cared for here.

I also go to Petsmart sometimes. I think they are cheaper for quite a few things, but Petco is cheaper in some cases as well (plus I get a 20% discount so its always cheaper for me).

I don't generally go to other pet stores that are close because they sell puppies and kittens. I have been to them, but it just makes me sad.