Table 2. Effect of particle size of zeolite included at 3% level replacing corn grain and soybean meal in equal parts in finishing diet for feedlot lambs.

Item		Zeolite particle size (mesh size)			SEM	p-value
	CON	M60	M100	M200		CON versus ZEOL	Linear	Quadratic
Days on test	67	67	67	67
Pen replicates	6	6	6	6
Live weight, kg a
Initial	20.87	20.99	20.94	20.92	0.106	0.51	0.75	0.45
Final	40.04	39.54	39.97	39.83	0.965	0.82	0.96	0.70
Average daily gain, kg	0.286	0.277	0.284	0.282	0.014	0.75	0.99	0.62
Dry matter intake, kg/day	1.097	1.081	1.103	1.089	0.047	0.91	0.87	0.76
Gain to feed, kg/kg	0.264	0.257	0.258	0.261	0.003	0.14	0.30	0.17
Observed dietary Net energy, Mcal/kg
Maintenance	2.05	2.02	2.02	2.04	0.016	0.23	0.29	0.34
Gain	1.39	1.36	1.36	1.38	0.014	0.23	0.29	0.34
Observed to expected dietary Net energy ratio
Maintenance	0.99	1.01	1.01	1.02	0.008	0.03	0.15	0.14
Gain	0.98	1.00	1.00	1.01	0.009	0.04	0.32	0.30
Observed to expected daily dry matter intake	1.01	0.99	0.99	0.98	0.009	0.05	0.26	0.24

DM = dry matter.

^aInitial live weight (LW) was reduced by 4% to adjust for the gastrointestinal fill. Final LW was obtained following an 18-h fast without access to feed (access to drinking water was not restricted).