I have 9 chickens in an enclosed coop in my backyard that has an attached henhouse with nesting boxes and roosts in it. Starting approximately 2 months ago every time I go out to collect eggs the nesting boxes will contain one or two eggs in them that are cracked or have a large hole in them with all the yolk/egg white eaten out or spread around the hay in the nest boxes. Sometimes one will be broken/eaten and the other will be intact, but it's rare that I'll have a day in which I don't encounter at least one broken/eaten egg while collecting. So what's doing this? None of the chickens themselves have been killed or injured by any type of animal, so whatever is doing it apparently isn't interested in them, just the eggs. Could it be the chickens themselves? I don't understand why they'd suddenly start eating their eggs after laying them, but they've been known to eat egg shell before so it could be. Another thing: the other day when I walked by I saw a chipmunk scurry out of a hole in the ground in the middle of the coop...I wouldn't think a chipmunk would be the culprit, but so far that's the only animal I've seen in there. I live in Maine if that helps narrow the possible culprit range down any. Anyone got any ideas?