Changes

Cysteine excess with methionine deficiency in puppies resulted in foot pad lesions<ref name="Burns"/>. Excess methionine intake in adult dogs can result in ataxia, disorientation, lethargy, [[Vomiting|vomiting]] and ptylism<ref>Biourge VC, et al. Methionine toxicosis in a group of hunting dogs. Proc Am Acad Vet Nutr Res Symp Dallas, TX. 2002, p.9-10.</ref>.

Cysteine excess with methionine deficiency in puppies resulted in foot pad lesions<ref name="Burns"/>. Excess methionine intake in adult dogs can result in ataxia, disorientation, lethargy, [[Vomiting|vomiting]] and ptylism<ref>Biourge VC, et al. Methionine toxicosis in a group of hunting dogs. Proc Am Acad Vet Nutr Res Symp Dallas, TX. 2002, p.9-10.</ref>.

====Cats:====

====Cats:====

Kittens fed methionine in excess of 10 times the growth requirements experienced a decrease in weight gain though no other signs of toxicity<ref>Taylor TP, et al. Optimizing the pattern of essential amino acids as the sole source of dietary nitrogen supports near maximal growth in kittens. J Nutr 1996;126:2243-2252.</ref>. Adult cats given excess methionine developed severe haemolytic [[Regenerative and Non-Regenerative Anaemias|anaemia]] with methaemoglobinemia and Heinz body formation<ref>Maede Y, et al. Methionine toxicosis in cats. AJVR 1987;48:289-292.</ref>.

Kittens fed methionine in excess of 10 times the growth requirements experienced a decrease in weight gain though no other signs of toxicity<ref>Taylor TP, et al. Optimizing the pattern of essential amino acids as the sole source of dietary nitrogen supports near maximal growth in kittens. J Nutr 1996;126:2243-2252.</ref>. Adult cats given excess methionine developed severe haemolytic [[Regenerative and Non-Regenerative Anaemias|anaemia]] with methaemoglobinemia and [[Heinz Body Anaemia|Heinz body formation]]<ref>Maede Y, et al. Methionine toxicosis in cats. AJVR 1987;48:289-292.</ref>.

==Dietary Sources==

==Dietary Sources==