Table 4.

Experiment 1. Effects of bedding level ¹ on pig measures ² in market weight pigs in WARM ³ and HOT ⁴ weather.

WARM weather; measures	Bedding level		p-value	R2
	3	4
	n = 41	n = 10
Surface temperature, °C	32.3 ± 0.4	32.9 ± 0.6	0.12	0.41
Vocalizations, % of pigs counted	3.0 ± 1.7	2.6 ± 1.8	0.59	0.04
Slips and falls, % of pigs counted	0.5 ± 0.2	0.4 ± 0.3	0.72	0.10
Stress signs, % of pigs counted	1.1 ± 0.3	1.5 ± 0.5	0.42	0.03
HOT weather	n = 67	n = 19
Surface temperature, °C	34.7 ± 0.2	35.3 ± 0.3	0.05	0.37
Vocalizations, % of pigs counted	1.9 ± 1.2	1.7 ± 1.2	0.56	0.01
Slips and falls, % of pigs counted	0.7 ± 0.4	0.6 ± 0.4	0.77	0.05
Stress signs, % of pigs counted	5.1 ± 1.3	7.6 ± 1.6	0.03	0.31

¹ Bedding level is the number of ~0.2 m³ (22.7 kg) bags of wood shavings/trailer.

² Pig measures were: surface temperature (measured laterally near the midline with a dual laser infrared thermometer on 10 pigs/load), vocalizations (extended sounds of high amplitude and frequency produced with an open mouth [2]), slips and falls (a knee, hock, or body touching the ground [14]), and stress signs (open mouth breathing, muscle tremors, and red-blotchy skin [15]).

³ WARM weather was defined as the temperature <26.7 °C; based on 48 loads.

⁴ HOT weather was defined as the temperature ≥26.7 °C; based on 88 loads.