Table 1.

Composition and nutrient levels of basal diets (as-fed basis)

	Diet
Itemsa	d 0–14	d 15–28
Ingredient, %
Corn	59.82	64.32
Soybean meal	15.00	15.80
Extruded soybean	6.30	6.00
Fish meal	4.00	3.50
Whey powder	4.00	3.15
Soybean protein concentrate	4.80	2.80
Soybean oil	2.20	0.90
Dicalcium phosphate	1.15	1.00
Limestone	0.82	0.60
Salt	0.30	0.30
L-lysine HCl	0.52	0.44
Methionine	0.18	0.12
Threonine	0.18	0.14
Serine	0.03	0.03
Chromic oxide	0.00	0.03
Choline chloride	0.20	0.10
Vitamin-mineral premixb	0.50	0.50
Total	100.00	100.00
Selected nutrient level, calculatedc
Digestible energy, Mcal/kg	3.55	3.48
SIDd Lysine, %	1.39	1.25
SID Methionine, %	0.49	0.41
SID Threonine, %	0.96	0.74
SID Serine, %	0.26	0.22
Crude protein, %	20.81	19.53
Calcium, %	0.84	0.70
Total phosphorous, %	0.65	0.61

^aExperimental diets were control diet (CON), CON + 75 mg/kg aureomycin (ANT), CON + 1 × 10⁸ CFU/kg S. boulardii mafic-1701 (SB)

^bThe vitamin-mineral premix contained (per kilogram of complete diet): vitamin A, 9000 IU; vitamin D₃, 3000 IU; vitamin E, 20.0 IU; vitamin K₃, 3.0 mg; vitamin B₁, 1.5 mg; vitamin B₂, 4.0 mg; vitamin B₆, 3.0 mg; vitamin B₁₂, 0.2 mg; niacin, 30.0 mg; pantothenic acid, 15.0 mg; folic acid, 0.75 mg; biotin, 0.1 mg; Fe (FeSO₄·H₂O), 75.0 mg; Cu (CuSO₄·5H₂O), 150 mg; Zn (ZnSO₄·7H₂O), 90 mg; Mn (MnSO₄), 60.0 mg; I (KI), 0.35 mg; Se (Na₂SeO₃), 0.30 mg

^cValues were calculated according to NRC (2012). ^dSID: standardized ileal digestible