Well my 10 week old chickens have been in their coop for about a week or two. I try to let them out of their run everyday and sometimes if I am home, I will put them in my 5x10 chicken tractor and leave them out for a while. Too many hawks in the area so I will not free range. There are 16 birds in the coop and my coop is 8x10. I don't think they are cramped, lots of space, but what can be causing them to be pulling feathers. I feed them Purina Start and Grow medicated and I make sure they have plenty of food and water. About every 3 days, I look for worms for them and they just devour them. Is the feather pulling due to protein deficiency even though the feed should be more than enough for them. Any suggestions on what to do. As I have posted before, I am a first time chicken raiser and try to read up on everything to educate me. Thanks - Ken