I live in Idaho, I have noticed recently that a few of my chicken eggs have been opened and eaten (leaving the shell). I don't think the chickens are doing this as normally they do not mess with whole eggs. My chickens are free range and roost/nest in my barn w/ goats. I have never lost one to a predator. What could be eating eggs but not harming my chickens. I have never seen snakes around my property. Any ideas would be greatly appreciated.