Page 92 - Raw Diet References Book 2019

Lysine

Lysine (Adult cats) The recommended values are a Burger IH, Smith P. Aminosäurenbedarf erwachsener Katzen. In:
based on a study by Burger and Smith a showing that Ernährung, Fehlernährung, und Diätetik bei Hund und Katze –
adult cats need 0.16g lysine per MJ ME to maintain a Proceedings of the International Symposium Hannover (DE),
positive N-balance. After adding a safety margin of 20% September 3-4, 1987: pp. 93-97.
this corresponds to 0.34% DM or 0.85g per 1000kcal ME.

Tryptophan

Tryptophan (kittens) Taylor et al. (1998) fed 15g/kg a Taylor TP, Morris JG, Kass PH. Maximal growth occurs at a broad
in a diet containing 450kcal/100g with no ill effects. a range of essential amino acids to total nitrogen ratios in kittens.
Amino Acids 1998; 15: 221-234
Herwill (1994) fed levels up to 60g/kg in a diet b Herwill A. MS thesis Univ California, Davis, CA USA. 1994
containing 470kcal/100g. Twenty was satisfactory
but food intake decreased at 40g/kg; much more
severe effects were observed at 60g/kg. Therefore the
maximum can be set at 2g per 470kcal or 1.7g per 100g
DM (400kcal/100g). b

Phenylalanine-tyrosine

Phenylalanine-tyrosine (All life stages) Diets a Yu S, Rogers QR, Morris JG. Effect of low levels of dietary tyrosine
with a moderate level of phenylalanine + tyrosine but on the hair colour of cats. Journal of small Animal Practice 2001;
higher than the minimum requirement for growth 42: 176-180.
may cause discolouring of black hair in kittens. a, b b Anderson PJB, Rogers QR, Morris JG. Cats require more dietary
This is corrected by feeding a food containing ≥1.8% phenylalanine or tyrosine for melanin deposition in hair than for
DM of phenylalanine or a combination of tyrosine and maximal growth. J. Nutr. 2002; 132: 2037-2042.
phenylalanine. b To maximise black hair colour, the c NRC Chapter 15. Nutrient Requirements and Dietary Nutrient
tyrosine level should be equal or higher than that of Concentrations. In: Nutrient Requirements of Dogs and Cats.
phenylalanine. c The National Academic Press, Washington, DC. 2006: pp. 357-
363 tables 15-10, 15-12 and 15-14.

Taurine

Taurine Studies have shown that the bioavailability a Hickman MA, Rogers QR, Morris JG. Effect of processing on fate
is lower when cats are fed a heat treated canned of dietary [14C]taurine in cats. J. Nutr. 1990; 120: 995-1000.
food. a, b To maintain adequate taurine status, a heat- b Hickman MA, Rogers QR, Morris J.G. Taurine Balance is Different
processed wet cat food needs to contain approximately in Cats Fed Purified and Commercial Diets. J. Nutr. 1992; 122:
2 to 2.5 times more taurine than a dry extruded food; 553-559.
the latter should contain 0.1% DM taurine. c, d c Earle KE, Smith PM. The effect of taurine content on the plasma
taurine concentration of the cat Brit. J. Nutr. 1991; 66: 227-235.
d Douglass GM, Fern EB, Brown RC. Feline plasma and whole
blood taurine levels as influenced by commercial dry and
canned diets. J. Nutr. 1991; 121: 179S-180S.

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