I have 2 clucky hens sitting on fertile eggs and of course the other girls come in and sit sometimes on top of them to lay their eggs.... This means I gotta rummage underneath them to find the non-fertile eggs, I don't want to disturb them and make them get off the nest too soon ! A bit worried about moving them to their own little nesting box as last time I did that it disturbed the hen so much she got off the dang eggs ! Any advice ?