We have 7 hens and 3 nest boxes. For some reason they all choose to use the same nest. This morning there was one hen sitting in the nest and two others were trying to get in. The other two nest boxes were completely vacant. When I went out later to collect eggs, one had gotten broken, one was in the coop and one was teetering on the edge of the ramp outside the coop. I would like to try to get them to use all of the nest boxes so we can possibly avoid breaking eggs. Does anyone have any suggestions for enticing them into the other two nest boxes?