Table 1.

Diet period durations, dry matter compositions, and nutrient digestibilities^{a, b}.

	Diet
Duration	Adapt	1	2	3	4
Week	4	16	28	8	44
Nutrient c
Crude protein, g/kg	278	224	185	157	156
Crude fat, g/kg	134	121	136	218	232
Crude fiber, g/kg	23	28	31	29	19
Ash, g/kg	63	96	89	79	83
ME, Mcal/kg	3.87	3.67	3.69	4.16	4.30
Protein ME, %	25.1	21.4	17.5	13.2	12.7
SAA, g/kg	8.5	7.4	6.1	8.5	6.0
Methionine, g/kg	5.6	4.3	3.4	3.6	3.4
Cystine, g/kg	2.9	3.1	2.7	4.9	2.6
SAA apparent digestibilityd, g/kg	nd	6.1	4.6	7.5	4.7
SAA true digestibility, %	nd	81.9	75.0	87.8	77.9
Methionine true digestibility, %	nd	87.8	84.0	88.3	85.0
Cystine true digestibility, %	nd	73.8	63.0	87.3	68.6
Taurine, g/kg	1.02	0.23	0.22	0.26	0.28

Adapt, adaptation; ME, metabolizable energy; SAA, sulfur amino acid; nd, not determined.

^aIngredients of the commercial, adaptation diet in decreasing order of weight were rice, chicken and chicken by-product, corn, chicken fat, beet pulp, minerals and vitamins, fish meal, salmon oil, yeast, egg.

^bIngredients of the experimental diets in decreasing order of weight were brewers' rice, rice bran, lamb-meal, poultry fat, lamb digest, proprietary vitamin and mineral mixtures.

^cConcentrations expressed on a dry matter basis.

^dDigestibilities determined with cecectomized rooster assays.