The invention relates to compositions for preventing chronic renal failure (CRF) in felines with hyperthyroidism wherein the compositions comprise (1) from about 28 to about 35% protein, the protein comprising at least about 75% vegetable protein, and (2) from about 0.1 to less than about 1 mg/kg iodine and/or from about 0.1 to about 1 mg/kg selenium. The invention also relates to compositions for treating CRF in hyperthyroid felines wherein the compositions comprise (1) from about 28 to about 35% protein, the protein comprising at least about 75% vegetable protein, and (2) from about 0.1 to less than about 0.3 mg/kg iodine and/or from about 0.1 to about 1 mg/kg selenium. The invention further relates to methods for preparing and using such compositions, articles of manufacture comprising such compositions, and means for communicating information about such compositions, methods, and articles of manufacture.
