We came back from a week's vacation to find 51 eggs from our 16 chickens. I have 3 hens that love to sit so I decided to let them sit on the eggs. I've marked all the eggs so that we can collect fresh eggs. I have lots of questions! 1. How soon will they begin to stay on the eggs (there's about 15-18 eggs in each 'nest')? 2. When can I candle & see the fertile eggs? 3. Should I reduce the amount of eggs or will the hens take care of that? Any other advice would be wonderful!