I have 4 chickens and they are great . All 4 are just over a year and laying every day. I currently have one that will not get off the nest. I think she is trying to lay and egg and can't. She has been on the nest for 2 days. I have lifted her out and no egg under her. When I lifted her out she walked around , got water and went back. Since she on the nest she has not pooped. She is very alert ( puffs up when I get close ) and look great but I am worried. Any advice ???