I wondered that same thing. I thought for a second and decided that if I was to use them, I would build a nest box big enough that it could slide into without being hindered anywhere and then just above the lip of the dish pan, I'd attach some 2x2 furring strips around the entire perimeter. That way, they could only step into the pan and not on the edge of it.Chicka, does she ever stand on the edge of the dish pan and flip it over? I bought some to use as nestboxes, but have been afraid they would flip the eggs out and break them. I have been intending to make a frame for them so the hens would stand on the wood instead of the lip of the pan.