Two similar experiments were conducted
to evaluate the effects of stress on growth and feed utilization
of broiler chicks. Stress was induced by continuous
delivery of adrenocorticotropin (ACTH) at 8 IU/kg BW/
d for 7 consecutive d. During the 7-d stress period, ACTHtreated
chicks did not exhibit increases in feed intake, but
increases in water intake concomitant with an increase
in excreta output were recorded. The ACTH caused decreases
in digestion of dry matter, proteins, gross energy,
and carbohydrates, whereas fat digestibility was unaffected.
Digestion of these nutrients was affected more
than absorption during the stress period.