Patent ID: 8377904

Claim:
A method for improving cartilage abnormalities in a companion animal comprising administering to a companion animal in need thereof a pet food composition comprising (i) 1.2-5% by weight of at least one sulfur-containing amino acid selected from the group consisting of D-methionine, L-methionine, DL-methionine, D-cysteine, L-cysteine, DL-cysteine, D-cystine, L-cystine, DL-cystine, and mixtures thereof; (ii) 50-200 ppm manganese; (iii) a source of protein; (iv) a source of fat; (v) a source of fiber; and (vi) at least one of glycine and proline, wherein the glycine is in an amount of at least 4.0 g/Mcal and the proline is in an amount of at least 4.0 g/Mcal.