Locked down 10 eggs at day19. So far 8 have hatched. Have 2 eggs left but not seeing movement. One egg is fairly large and has a air pocket but can't tell any movement- just dark. The other egg has air pocket at the little end. I know the first 3 chicks to hatch moved around alot and moved the other eggs some. Should I just wait or does the lack of movement and sound mean they didn't make it? How long past 21 days can an egg go before hatching? I have read up to day 26 but seems most say by day 21. Thanks for any help.