The Petco by my house has a PetSmart right across the street. The PetSmart is always really busy with dogs all over the place. No one is ever at the Petco and I never see dogs in there. I did take Harley and Reece in there before but I felt like they might not be allowed because I never see other dogs there. No one said anything to me about it though. I just prefer our PetSmart because its the new, remodeled one complete with vet and all (although I don't use their vet).