So I set like I think 20 chicken eggs. 0 hatched, but usually, if they dont hatch on the 21st day, then we leave them in for a little longer. Then here came the 28th, and something started hatching.... A DUCK?! So we had ducks, but we didnt think they were old enough to lay. So we watched the duck hatch, but it wasnt strong enough, do it didnt make it. That is how we discovered that we were getting duck eggs.