Hello. I bought my first 3 chicks about 2 weeks ago and my first hens a little over a week ago. I kept the hens cooped up for 6 sleeps before letting them free range. They leave the coop now as soon as I open the door in the morning and they put themselves to bed each night like clockwork. What I don't understand is when I have close to an acre for them to run around, they spend most of the day sleeping on the door step and pooping on my outdoor area concrete.?