I am attempting to hatch chicken eggs with my class of 8 and 9 year olds. We have three eggs in a small school incubator. Unfortunately 2 weeks ago I had an emergency appendectomy and so have not been in school to take care of my eggs. Luckily the care taker has incubated eggs before and maintained the water levels in the incubator that automatically turns the eggs. Because of my sick leave I have not been able to candle the eggs and now its the 21st day of incubation and I don't know what to do Please help!