An object of the present invention is to provide an approach for inhibiting renal hypofunction in a non-human animal. The present invention provides a method for inhibiting renal hypofunction in a non-human animal, comprising a step of administering cat-derived erythropoietin to the non-human animal. The present invention also provides a medicament for non-human animal use for inhibiting renal hypofunction in a non-human animal, comprising cat-derived erythropoietin.