1. I have a 5 month old roo who has begun mating the hens... is it too early for the eggs to be fertile yet? 2. I have a broody hen, so I want to leave some (hopefully fertile) eggs under her and try to let her hatch them out and raise them naturally. Can I add eggs for 2 or 3 days to the ones she's sitting on... and will she keep sitting till they all hatch? 3. She's in a raised nesting box... do I need to move her to ground level? If so, how soon do I move her? Thank you!