I read on here somewhere that ducks can lay up to 30 eggs before they start sitting on them. How do you know if they will eventually sit on them or are just laying them in the same place? I now have 3 duck nests, one has 26 eggs, one has 17 eggs and the other has 9 eggs. I have yet to see a duck sit on any of the nests, except to lay their daily eggs. How long do I let them keep laying? I don't want to take the eggs away if there is a chance they will sit on them, specially if it takes them so long to gather enough to hatch. But I also don't want 50+ rotten/rotting eggs exploding in my duck houses. From what I can tell, they are laying the eggs and then putting a bit of hay over top of them, before leaving the nest. I am not having the best hatch rates with chicken eggs yet, don't think I am ready to try hatching duck eggs. I would love to get some Blue and Black Swedish ducklings to sell though.