1All of these ingredients were supplied by Great Seven Biotechnology Co., Ltd., China.2Vitamin premix (mg or g/kg diet): cholecalciferol, 5 mg; retinol acetate, 32 mg; thiamin 25 mg;vitamin B12 (1%),
*Vitamin and mineral mix (values are g kg− 1 except those in parenthesis): Premix: 25; Choline, 10; DL-a-tocopherol, 5; ascorbic acid, 5; (PO4)2Ca3, 5. Premix composition: retinol acetate, 1 000 000 I
