Table 2.

Comparative effects of lipid-coated ZnO (Shield Zn [SZ]) vs uncoated ZnO on growth performance and fecal consistency of weanling pigs

Variable	ZnO1)		SZ1)			SEM	p-value
	100 (NC)	2,500 (PC)	100	200	400		Contrast		Regression3)
							NC2)	PC2)	L	Q
BW (kg)
Day 0	5.13	5.81	5.74	5.36	5.50	0.21	0.010	0.262	0.524	0.651
Day 7	6.22	7.26	6.97	6.89	6.47	0.30	0.113	0.171	0.162	0.154
Day 14	8.51	9.49	9.21	9.39	8.67	0.35	0.156	0.325	0.119	0.089
ADG (g)
Days 0–7	156	207	175	219	138	25	0.456	0.315	0.138	0.079
Days 7–14	326	319	319	356	315	20	0.869	0.647	0.600	0.442
Overall	241	263	247	288	226	17	0.529	0.651	0.147	0.070
ADFI (g)
Days 0–7	245	288	258	265	237	19	0.706	0.122	0.312	0.273
Days 7–14	599	689	592	652	574	35	0.867	0.051	0.470	0.340
Overall	422	488	425	458	405	25	0.791	0.048	0.356	0.259
Gain:feed
Days 0–7	0.620	0.711	0.653	0.821	0.608	0.077	0.414	0.852	0.442	0.301
Days 7–14	0.546	0.473	0.547	0.559	0.559	0.040	0.849	0.081	0.862	0.882
Overall	0.570	0.546	0.585	0.635	0.570	0.039	0.556	0.267	0.610	0.501
FCS4)
Day 0	0.13	0.25	0.00	0.00	0.13	-	-	-	-	-
Day 7	0.25	0.50	0.13	0.38	0.25	0.155)	-	-	-	-
Day 14	0.25	0.13	0.13	0.13	0.13		-	-	-	-
Overall6)	0.21	0.29	0.08	0.17	0.17	0.09	0.478	0.121	0.473	0.535

NC, negative control; PC, positive control; SEM, standard error of mean; L, linear; Q, quadratic; BW, body weight; ADG, average daily gain; ADFI, average daily feed intake; FCS, fecal consistency score.

¹⁾The numeral under the column heading indicates the dietary Zn concentration in mg/kg provided by the Zn supplement. Data are the means of 8 piglets.

²⁾Total SZ (SZ-100, -200, and -400) vs NC and total SZ vs PC, respectively.

³⁾Linear and quadratic regressions on the dietary SZ concentration within the total SZ group piglets were analyzed separately.

⁴⁾Scored subjectively: 0, formal firm feces; 1, soft feces; 2, diarrhea.

⁵⁾Applies to all day×treatment combinations.

⁶⁾The p values for the day and day×treatment were 0.086 and 0.915, respectively.