EXTERNAL ADMINISTRATION. “PACAP has also a strong modifying effect on the energy metabolism. Intracerebroventricularly administered PACAP appeared to stimulate catabolic effects on energy metabolism in chicken: it increased body temperature, metabolic rate and lipid utilization. Moreover, increased PACAP concentrations in the chicken brain inhibited feeding, which was later shown to be mediated by corticosterone release.”
http://rspb.royalsocietypublishing.org/content/early/2011/02/11/rspb.2010.2567