Can I go from letting my hens lay on their eggs and then on day 18 put the eggs in the incubator for the rest of the time?? Or is that too much of a drastic change for the eggs? Reason for my question is I have 2 hens who share the laying on the eggs time and another hen that keeps cracking eggs and eating them I always find an egg broken in the midst of the other eggs (is this normal?) and I also noticed that the rooster is always hanging around the hens who are lying on the eggs. I'm just worried about the chicks getting ready to hatch that they will be killed by either the egg cracking hen or the rooster. Do roosters attack chicks??