Table 4.

The effects of feeding yeast bioactives (YB) to broiler breeders and/or their offspring on growth performance of broiler chicks upon challenge with Eimeria (day 9 to 14).¹

Item		ADFI, g/bird/day	ADG, g/bird/day	FCR, g/g	BW, g/bird
Main effect, sex
Male		46.0	31.4	1.46	393.0a
Female		44.3	31.4	1.41	357.0b
SEM		1.908	0.506	0.076	7.977
No		47.7	37.0a	1.29b	407.5a
Yes		42.6	25.8b	1.65a	342.6b
SEM		1.908	0.506	0.076	7.977
Main effect, feed
Broiler breeder	Broiler chicks
Control	Control	47.0	32.5	1.45	390.5
YB	Control	44.3	31.7	1.40	376.3
Control	YB	44.2	30.0	1.47	359.5
YB	YB	45.0	31.4	1.43	373.7
SEM		2.699	0.716	0.107	11.282
Probabilities (P-value)
Sex		0.521	0.938	0.872	0.003
Eimeria challenge		0.062	<0.001	<0.001	<0.001
Feed		0.872	0.121	0.326	0.296
Sex × Eimeria challenge		0.859	0.146	0.141	0.418
Sex × feed		0.926	0.351	0.145	0.891
Eimeria challenge × feed		0.663	0.849	0.573	0.310
Sex × Eimeria challenge × feed		0.224	0.280	0.421	0.575

^a,bMeans assigned different letter superscripts within a response criterion differ, P < 0.05.

¹BW, body weight; ADG, average daily gain; ADFI, average daily feed intake; FCR, feed conversion ratio.