All of my chickens have always gone to roost in the coop at night. But the last 2 nights, 3 hens have tried to roost up against the house. The first night they were all trying to squeeze up agains the door. It was still fairly light outside, so I cracked the door open in an attempt to scare them off (usually works), but a hen stuck her head in the door and they tried to get inside the house! I pushed them back, closed the door, & went outside. I carried them one-by-one to the coop and put them on a roost. The second night, I didn't come home until after 10pm, and noticed they were up against the house again. This time 2 were up against the door again, and the other was up on a window ledge. So again I went out and carried them to the coop. I can't figure out why they are doing this all of a sudden. The other 23 chickens and 8 chicks are still going to the coop like normal. There is plenty of empty roost space.