At most pet stores, or all of the pet stores I've been to, all I've seen made me sick to the stomach. Tiny little cages, never food, barely any water and just ripped up paper shreds as a ''pillow''?
Puppies that grow and that still haven't been sold are too big to even lie down in the cages they are put in, but the sales person doesn't mind knowing all they are going to do is get paid without thinking of the suffering of those animals.
You should ONLY adopt, that's when you are actually saving a life, buying animals in a normal pet store is only going to support their cruel business.