Thus, it suggested that Thai native cattle could nearly maintain their RT even in the high
temperature season. Between the seasons, respiration rate was significantly different (13.8 ± 1.5 breaths/min in low temperature vs. 22.6 ± 3.8 breaths/min in high temperature, P < 0.01). Generally, the increase in respiration rate is observed from the animal under heat load (Beatty et al., 2006; Nonaka et al., 2008; Gaughan and Mader, 2009).