Have had a super failure on our last hatch, 15 eggs had one live chick and one dead half hatched. Just wondering when to pull the plug on the batch? Its day 23 now. So upset with this lot of eggs, granted they came out of a VERY cold hen house but they candled just fine and growing right up to lock down and with no heat or humidity issues during incubation we wernt expecting anything less than a great hatch. During lockdown the humidity did go up to 80% for a few hours but I shouldnt have thought that would kill all the eggs? Never count your chickens eh?