My hens have an excellent coop. I built a nice nesting shelf with 3 nests, with no dividers. They only use one. Is there a way to get them to use all 3? Should I put dividers in between? I'm frustrated, because one of my hens refuses to share, and sits all day, making it rough for the others to lay... BUT THEY HAVE 2 MORE AWESOME CLEAN NESTS TO USE!!!!!!! Any suggestions?