I have built a coop 2.5m X 3m. Inside are 4 nesting boxes and roosting poles that could hold (if the dimensions in books are correct) about 20 chickens. But this seems like a lot of birds crowed into one space. I can stand up comfortably at the door end and it slopes to about shoulder height at the back. What would be the maximum number of birds to sleep in a place this size? I am considering buidling a separate low nesting house as my birds don't use the boxes at all! Hope my attempt at imbedding a picture works!