Table 1. Ingredient composition of experimental diets
| Items | 0-7 d | 8-14 d | 15-21 d | 22-28 d |
| Ingredients (%) | | | | |
| Corn | 37.6 | 42.2 | 46.1 | 49.7 |
| Wheat fine | 15.3 | 15.1 | 15.6 | 15.2 |
| Rice pollards | 2.4 | 2.5 | 2.5 | 2.6 |
| Soybean meal | 26.9 | 21.0 | 17.7 | 15.5 |
| Cookie wheat flour | 1.9 | 2.0 | 2.0 | 2.0 |
| DDGS | 5.0 | 7.0 | 6.0 | 5.0 |
| Animal protein | 3.3 | 2.5 | 2.5 | 2.4 |
| Fishmeal | 3.0 | 3.0 | 3.0 | 3.0 |
| Defatted BSFL | - | - | - | - |
| Hydrolyzed BSFL | - | - | - | - |
| Animal fat | 1.7 | 1.9 | 1.9 | 1.9 |
| L-Lysine | 0.6 | 0.6 | 0.6 | 0.5 |
| L-Methionine | 0.4 | 0.3 | 0.3 | 0.4 |
| L-Threonine | 0.2 | 0.1 | 0.1 | 0.1 |
| L-Tryptophan | 0.1 | 0.1 | 0.1 | 0.1 |
| Salt | 0.2 | 0.2 | 0.2 | 0.2 |
| Limestone | 0.5 | 0.6 | 0.5 | 0.5 |
| MDCP | 0.2 | 0.2 | 0.2 | 0.2 |
| Liquid-Choline | 0.1 | 0.1 | 0.1 | 0.1 |
| Vitamin premix | 0.3 | 0.3 | 0.3 | 0.3 |
| Mineral premix | 0.3 | 0.3 | 0.3 | 0.3 |
| Total | 100.0 | 100.0 | 100.0 | 100.0 |
| Chemical composition | | | | |
| AMEn (Kcal/kg) | 3,000 | 3,020 | 3,070 | 3,100 |
| CP (%) | 23.3 | 21.3 | 20.2 | 19.1 |
| Ether extract (%) | 5.3 | 5.9 | 6.0 | 5.8 |
| Crude fiber (%) | 3.4 | 3.4 | 3.2 | 3.0 |
| Crude ash (%) | 5.8 | 5.3 | 5.1 | 4.8 |
| Calcium (%) | 0.9 | 0.8 | 0.8 | 0.7 |
| Phosphorus (%) | 0.5 | 0.6 | 0.5 | 0.5 |
| Lysine (%) | 1.5 | 1.3 | 1.2 | 1.1 |
| SAA (%) | 1.1 | 1.0 | 1.0 | 1.0 |
Supplied per kg diet: vitamin A, 9,000 IU; vitamin D3, 3,000 IU; vitamin E, 48 mg; vitamin K, 3 mg; thiamin, 1.8 mg; riboflavin, 6 mg; pyridoxine, 3 mg; vitamin B12, 0.012 mg; niacin, 42 mg; folic acid, 1.2 mg; biotin, 0.24 mg; pantothenic acid, 12 mg.
Supplied per kg of diet: manganese, 120 mg; zinc, 100 mg; iron, 80 mg; copper, 20 mg; iodine, 2 mg; selenium, 0.3 mg; cobalt, 0.5 mg.
DDGS, dried distiller’s grains with soluble; MDCP, mono-dicalcium phosphate; SAA, sulfur amino acids; AMEn, nitrogen-corrected apparent metabolizable energy; CP, crude protein.