Table 6.

Latency data (mean ± SE) on groups of piglets for Experiment 2.

Latency Variable (s) 1	CO2	N2O	p-Value
First Piglet Heavy Breathing	30.94 ± 2.15	364.46 ± 5.35 2	<0.001 *
First Piglet Open-Mouth Breathing	39.94 ± 2.58	386.22 ± 4.44 2	<0.001 *
First Piglet Gaping	88.13 ± 6.43	425.88 ± 4.63 2	<0.001 *
All Piglets Gaping	115.73 ± 5.24	458.38 ± 5.76 2	<0.001 *
First Piglet Loss of Posture	71.80 ± 5.13	191.50 ± 11.61	<0.001 *
Last Piglet Loss of Posture	105.65 ± 1.96	315.90 ± 11.61	<0.001 *
First Piglet’s Paddle Bout	278.26 ± 65.66	427.43 ± 17.09 2	0.043 *
First Piglet’s Last Movement	353.05 ± 13.03	617.27 ± 13.36 2	<0.001 *

¹ s = seconds; * p < 0.05 significant statistical difference. ² This behavior was shown in piglets exposed to CO₂ post-N₂O.