Hello. We have 3 hens and 3 nesting boxes inside of a large old Dog house. I find Daily that one box is filled with Fecal matter the other box is not used at all and today I found 2 eggs in the same box. Is it normal for them to lay eggs of a different hen in the same box after the other one lays? Why would they defecate in one box all the time? should I take that box out? Thanks.