I have a new hampshire and a black ostrolorp hen that are sitting. When they get off of there nest to eat they never find there way back to there eggs. They are locked in there coop. Why are they going to other nest? I have one in one coop and the other in the other coop. One has 3 nest and the other has 6. The other hens that have set have never had any problems getting back on there nest. What is going on with these two hens? Please help if you can. DJ