Table 1.

Effects of heat stress on body temperature indices, feed intake, and body weight

	Day						SEM	P
	P1*	1	2	3	4	5		Trt†	Day	T*D‡
Rectal temperature, °C
PFTN§	39.02	39.06a	38.86a	38.82a	38.93a	38.87a	0.16	<0.01	0.61	<0.01
HS**	39.09	39.91b	40.23 cd	40.33d	40.02bc	40.07bc
Respiration rate, bpm
PFTN	45	40xy	42z	41xyz	34x	39yz	5	<0.01	0.04	0.27
HS	41	93xy	115z	108xyz	95x	114yz
Feed intake, kg
PFTN	1.88	1.10y	1.16y	0.96x	1.47z	1.50z	0.07	0.46	<0.01	0.91
HS	1.89	1.16y	1.19y	0.99x	1.57z	1.48z
∆BW††, kg
PFTN						5.2	0.4	0.01
HS						7.0

Means with different letters differ (a–d) (P ≤ 0.05).

Days with different letters differ (x–z) (P ≤ 0.05).

^*Represents period 1 values that were statistically used as covariate.

^†Treatment.

^‡Treatment by day interaction.

^§Pair-fed thermoneutral.

^**Heat stress.

^††Change in body weight from period 1 to 2.