What is petpet supplies plus? Pet Supplies Plus, founded in 1988 in Redford, Michigan in the United States, is a privately held pet supply retailing corporation with a major presence in the US.Are dogs allowed in pet supplies plus? Pets are allowed to walk through the aisles of the Pet Supplies Plus stores. This store provides treats, chew toys and other such products which are located on low shelves making it possible for dogs to reach them.Can i view my upcoming appointments on pet supplies plus? Yes, to view your upcoming appointments, login to your Pet Supplies Plus account. Then, click on the “My Grooming Salon” link. You will be able to view upcoming and previous appointments for your dog. Can I cancel an appointment online? Yes!