The friendly online pet store helping owners make their pets happy from head to tail. At Monster, we’re just like your pets - friendly, playful and totally one-of-a-kind. That’s because we don’t just deliver your pet food, we get to know you and your little monsters, so we can help you to keep them happy from head to tail. Monster Pet Supplies also works in partnership with Waitrose to create, build and trade their online specialist pet offering, WaitrosePet.com. Waitrose, 45% of whose customers own pets, are the first supermarket to launch a pure-play specialist pet website.