When Leo arrives at the hospital, he is surprised to find it run by animals! Two slightly distracted parents accidentally send their son, Leo, to the animal hospital to get his tonsils out. It's right next to the people hospital, so it's an easy mistake to make. Luckily this animal hospital is open-minded and willing to take in this strange patient. The chicken behind the intake desk is very kind, the bear orderly gives Leo a dog treat and Dr. Stan, who is a mouse, is a very skilled and caring doctor. It IS a little weird when the nurse comes clip-clopping in, pats him on the head and gives him a flea collar. Leo has to wear a plastic cone around his neck after surgery too. And are the nail clipping and shampooing and brushing really necessary?