I have 5 EE hen's and one rooster ( he was supposed to be a hen, lol) they are 12 weeks old. They have a nice coop and a 6x12 pen. I want to free range them when I am working in the barn, our place is 5 acres, fenced for horses. I have not tried it yet. I am worried about not being able to get them back in! First time chicken owner! Love my chickies!