A pet food comprising refined cellulose and having a moisture content of 6-15 mass%, wherein: the average grain size of the refined cellulose is 50 μm or greater; and 60% or more of food grains, relative to the total food grains constituting the pet food, have a hardness of 2.5 kgw or less immediately after soaking in dilute hydrochloric acid (pH 2.5) at 25