I've been away for 4 days with a neighbour looking after my 2 hens. She informed me my bantum cross has hardly been out the coup. She had been spendng more time in there before I went away too. Checking today, I opened the coup lid and she was sitting in the nest box, ruffled her feathers and squaked at me aggressively. She hasn't been seen out of the coup all day so far. My other hen seems fine and spritley. Any advice?