Figure 2

Plasma cortisol response in goats to the appearance of a dog. Plasma cortisol concentration in seven goats exposed to a dog between 10:30 and 10:45 (vertical, hatched lines), first during pregnancy (open symbols) and later during lactation (filled symbols). Data are presented as means ± standard error of the mean (SEM). Plasma cortisol concentration was elevated in the sample withdrawn at 10:45 compared to the sample taken at 10:00 (p < 0.05) during both pregnancy and lactation, but did not differ from the samples obtained at 10:20.