PetSmart is the largest specialty retailer of services and solutions for the lifetime needs of pets. Having over 900 pet stores in the United States and Canada, it was only a matter of time before PetSmart went online. Their web store houses more than 13,000 different products, available 24 hours a day, 7 days a week. Organized by the type of pet, PetSmart.com offers specialty items for dogs, cats, domesticated and wild birds, fish, reptiles and small mammals. From housing and toys, to feeding and training, PetSmart.com has everything you could possibly need for your pet, that is except a veterinarian, those are available at many of the PetSmart stores. .