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Sows were fed diets with adequate (AP, 12.1%; n = 9), high (HP, 30%; n = 9) or low (LP, 6.5%; n = 9) protein concentrations and salivary cortisol was measured prior to gestation (GD 0) and on GD 24, 58 and 79. Values are LS means + SE. Significant differences between diet groups are indicated by asterisks (*P<0.05). Salivary cortisol concentrations were higher in the LP sows compared to the HP and AP sows.
