So, it's my first time trying to hatch eggs the old fashion way, so please ignore my stupidity. To start we left 3 eggs we marked with a marker in the coop. We have two hens sitting on them and for the past week they have been doing a great job. Well, today we went to gather eggs and 2 of the 3 was missing. We have checked over the coop and can't find them or any trace of a shell. What happened? Any advice is helpful, thanks!