I've been waiting for a special hen to lay an egg and she is waaay over due. I know there are rats around, is it possible they are eating an entire egg nightly? The hen sits quietly in the same box, same position nightly and there is never an egg. The hen gets a good mixed diet and daily commercial feed. I've tried poisoning the rats, using snap traps and even a havahart trap, but can't seem to erradicate them. I even try to feed just what the chickens eat in day. During the day the hen runs in a small fenced enclosure without any kind of harrassment from predators.