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TABLE A9-1 Composition of Representative Diets for Rats and Chicksa
Ingredient	Rat Diet (g/kg)	Chick Diet (g/kg)
Milk powder		250
Casein, high protein	200	150
Ground corn, acid washed	673	230
Non-nutritive fiber		50
Dextrose, anhydrous		142.5
Corn oil		100
Soybean oil	70
CaCo3	15	14
KH2PO4	10	4
Choline bitartrate	2.5
A vitamin mix in cornstarch and a mineral mix in dextrose was added to the rat diet to furnish all known miconutrient requirements. The chick diet was slightly different to meet requirements of that species.
Vitamins added to diet: (mg/kg): Niacin (30); d-pantothenic acid calcium (16); pyridoxin HCI (7); thiamin HCI (6); riboflavin (6); folic acid (2); d-biotin (0.2); vitamin B12(0.02); d,l-a-tocopherol acetate (120); retinyl palmitate (16); vitamin D3 (2.5); vitamin K, (0.75).
Trace elements added to diet: (mg/kg): CaHPO4 (1,265); K2SO4 (1,632); CaCI2.2H2O (1,000); Na2CO3 (1,500); Mg(C2H3O2)2.4H2O (3,600); NaSiO3.9H2O (254); ferric citrate (220); zinc carbonate (58); manganese carbonate (22); copper acetate (11); KIO3 (0.35); Na2SeO4 (0.36 mg/kg); NH4MO7O24.4H2O (0.37); CrK(SO4)2.12 H2O (9.6); H3BO3 (2.9); NaF (2.2); NiCO3 (2.2); SnO (0.25); NH4VO3 (0.46).
aData from Nielsen et al. 1978; Nielsen 1980; Uthus et al. 1983; Uthus 1992.

Goats and Minipigs

The animals are kept in plastic-lined wooden cages with cellulose as bedding material. An estimated 100 g per day of cellulose (arsenic at less than 15 ng/g) is eaten by goats. Cellulose contributes to their energy intake and dilutes the arsenic content from less than 35 ng/g in the semisynthetic diet to less than 20 ng/g in the total. Table A9-2 gives the composition of the rations fed ad libitum to both species.