not a big deal. in the wild, they would eat anything they could grab.

from the link:
"Corns are most active at night or in the hours of dawn and dusk (crepuscular). While they are primarily ground-dwellers, some are semi-arboreal. While the Elaphes feed on everything ranging from fish to frogs to rodents to mammals, wild Corns start off feeding on small invertebrates and vertebrates, such as crickets"

http://www.anapsid.org/corn.html