I have a feeling my teenager chickens are developing a bad habit. I just completed the nest boxes in their coop now they all cram in there to sleep. 9 chickens are cramming themselves into 2 nest boxes! All are 8 week olds with 2 3 month old Cochins! They look like battery hens for cripes sakes. Should I put up a barrier to keep them out of there? They have 2 nice 2x4 roosts in the coop. But they have never used them. They used to just sleep on the floor, Crammed into a corner in a chicken ball. I went out tonight and shut the vents down. Its in the 40's at night. Insulated coop. All chicks have been outside for 2 weeks now. All are fully feathered. But they act like they are cold the way the crowd eachother in a corner.