Big Mama, my Silkie has been sat on 7 eggs in the coop since Nov 21st. One chick hatched successfully, but she is still sat on the other 6. I have candled the eggs and see a black mass in 5 of them but no movement. Big Mama won't leave the eggs for longer than 10 minutes. Should I take the eggs away or does she know best? It seems like such a long time in between the one chick hatching??