For the past two nights, I have lost a pullet in an enclosed pen INSIDE a concrete block barn. After the first loss, my husband pulled the fan from the window and closed and locked the window, then walked the barn and fixed any areas he thought something could possibly slip in at. This morning I go out and another chicken is dead!!! Both chickens were basically eaten by gutting and the heads were also gone. So if anybody has any ideas about who the culprit is AND what can I do to prevent it from happening again, I'd be forever grateful...I am heartsick over this. It has never happened before this year and we've had them for 5 years. The ducks, turkeys and other chickens and goats were NOT harmed. We are totally cleaning the barn this weekend from top to bottom searching for entrance points, but it would be helpful to know what we're looking for. Thanks to everyone who can help!