the impact of different stressors (Adrenocorticotropic hormone [ACTH] injection or food and water deprivation) on hen physiology (measured as glucose metabolism) are reflected by changes in plasma corticosterone. We tested the hypothesis that changes to plasma corticosterone would not reflect changes to tissue corticosterone under 2 different conditions. First, hens were evaluated for 180 min after an intravenous injection of ACTH, and second, hens were evaluated for 24 h after food and water deprivation.