Figure 4. Plasma cortisol concentrations in pigs weaned at 14 d
(n = 8 pigs; ●), 21 d (n = 7 pigs; ∆), or 28 d (n = 8 pigs; □) of age.
Blood samples were collected from all pigs each day. Values are least
squares means ± SEM. By day, differences among treatments are designated:
***P < 0.01