I have read on here that pullet eggs are hard to hatch. So when do they become a hen and at what point can you consider hatching their eggs? Are pullet eggs just usually not fertile or is it something else that makes them hard to hatch? I have one that started laying about 2 weeks ago, her first 3 eggs were Jumbo then the next 3 or 4 were oval and hard to tell the big end from the small end. They are pretty normal looking large eggs now.