How long from the eggs calling and moving do they normally pip? My neighbour has been incubating eggs for 21 days now and upon checking them today with candeling machine (I only just managed to go today to check them) all the clutch but two were 'bad' eggs. 1 deffinately moved whilst being candeled and the other one we not 100% sure but think we did see some movement. We have been clucking to the eggs today and atleast one soon started to call back to us. The same egg then started to rock and twitch frequently, we have been clucking to it for over 4 hours and it still hasnt pipped. How long does it normally take? Should we be worried?