Abstract: A pet food product having an excellent antiobesity effect and a method of feeding a pet pet food. The pet food product includes two kinds of pet food different in composition, pet food A and pet food B, in a manner such that they are not mixed with each other. Pet food A contains 30 to 60 mass % carbohydrate, 20 to 35 mass % protein, and 10 to 25 mass % fat. Pet food B contains 50 to 75 mass % carbohydrate, 15 to 30 mass % protein, and 5 to 15 mass % fat. Pet food A and pet food B have a relationship such that after at least three hours from feeding a pet one of them, the other is fed to the pet. Pet food product has a pet food A to B content ratio of 1 to 2:1.