if you take all the eggs away ducks. geese will definatly lay somewhere else and you have to find the nest, hens may do the same so you leave a china egg in its nest, i recently got about 10 alabaster and wooden eggs from a charity shop multi coloured but it doesnt matter........... also if you have a broody but not enough eggs (12) for it to sit on you put the false eggs or golf balls under it to sit on for a few days and swop for 12 fertile eggs when you have enough so they hatch all togther