One of my chickens started acting broody and wouldn't come out of the nesting box. Now all three of my girls huddle up in one nesting box all day long and they all quit laying eggs. This is a picture of one of their bellies but they all look the same. I thought they were just broody but are they molting ? Or what? They literally stay in the nesting box all day long unless I get them out to roost at night. And they all get mad at me if I try to get them out.