I have a heat lamp in barn to help with a game camera with a dud infrared light. An Opossum that is small and apparently trapwise is target of interest. It about to be harvested because it is now flushing chickens from roost. Despite that, the juvenile chickens in the barn are feeding for at least four hours of the night, sometimes even as the Opossum appears to be chasing them. Two things at play in additions to Opossum. First is moths are flying very heavy in barn and possibly attracted by light. Secondly, the juveniles may be depleting their crops shortly after midnight. I will say the juvenile chickens are in exceptional condition and not interested in feed when applied at dawn.