From the available literature it appears that the protein requirements of cats are high by comparison with those of other species. Dickinson & Scott (19563) found that satisfactory growth of kittens could not be maintained if the protein content of the diet on the dry-weight basis was below 30 yo, and Greaves (1959) found 32 o/ o protein necessary for growth. My work was undertaken in order to determine the effect on the serum proteins of growing kittens of a diet containing 2 1 yo protein on the dry-weight basis, thus providing a protein content 10 % lower than that regarded as able to support satisfactory growth.
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