My 4 hens start out the night all crowded into one corner of the coop. They have lots on room in there and by morning when I let them out they are on the ladder roost in there. But at night they jam in tight in the corner. Its weird looking. Now, these 4 survived an ugly nighttime raccoon attack where 5 of their sisters did not. It must have been tramatic for them and I was wondering if this could bring on such nighttime behavior. Anyone else experience this?