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Lysine and Arginine Requirements of the Domestic Cat

Department of Animal Science, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801

Domestic kittens were used in four experiments to establish quantitative requirements for lysine and arginine. A purified L-amino acid diet (by calculation, 4,700 kcal metabolizable energy/kg diet) was employed throughout. Weight gain, gain:feed and nitrogen retention data of cats fed dietary lysine levels ranging from 0.48 to 1.92% suggested a requirement not exceeding 0.80%. The dietary arginine requirement for maximal gain was assayed at this level of lysine and found to be not greater than 0.83%. A dietary arginine level of 0.33% resulted in vomiting and extreme lethargy within 4 hours of ingestion.

KEY WORDS: • cats • lysine • arginine • growth • dietary requirement

Manuscript received 14 November 1978.

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