Table 7.

Effect of dietary treatment on behavior (% of time) from days 2 to 12 postweaning1

	Replicate		Diet				P
Behavior	Summer2	Spring3	A4	GLN5	NA6	SE	D7	R8	D x R
Huddling9, %	5.52	15.38	10.30	8.58	11.20	1.46	0.92	<0.01	0.84
Active10, %	9.14	12.49	10.90	10.64	10.71	0.55	0.78	<0.01	0.14
Resting11, %	77.55	73.07	73.60	77.13	74.94	1.33	0.12	0.34	0.33
Aggressive12, %	1.39	1.57	1.74x	1.28y	1.41xy	0.19	0.09	0.14	0.70
Eat/Drink13, %	8.70	11.26	10.70	9.96	9.14	0.51	0.17	<0.01	0.18
Nonvisible14, %	0.75	0.34	0.83	0.41	0.36	0.37	0.26	0.04	0.67

¹A total of 10 pens were used per dietary treatment per replicate.

²Pigs weaned and transported for 12 h during July 2016.

³Pigs weaned and transported for 12 h during April 2017.

⁴Pigs provided dietary antibiotics [chlortetracycline (441 ppm) + tiamulin (38.6 ppm)] for 14 d postweaning and transport and then fed common antibiotic-free diets.

⁵Pigs provided 0.20% l-glutamine for 14 d postweaning and transport and then fed common antibiotic-free diets.

⁶Pigs provided no dietary antibiotics for 14 d postweaning and transport and then fed common antibiotic-free diets.

⁷Dietary treatment.

⁸Replicate.

⁹When 3 or more pigs are touching while lying down and 50% of a pig’s body is touching another pig; collected independent of other behaviors.

¹⁰Piglets are walking about or interacting in a nonaggressive manner with each other or their environment.

¹¹Piglets are lying, either ventral or sternal, either alone or loosely in groups, with gaps of spaces between them.

¹²Piglets are engaged in agonistic interactions.

¹³The piglet has its nose in the feeder or its mouth on the waterer.

¹⁴When piglet moves out of view and cannot be observed.

^x,yLetters indicate tendencies (0.05 < P ≤ 0.10) within a row dietary treatment.