I had a hen hatch out 4 and get off the nest and didn't get out to check the eggs I had assumed were dead, with mom off them and cold night time temps, but when i picked one up I heard the cheep in the egg, so instead of just tossing them planned out of 4 eggs still in the nest 2 still had live chicks in them one got out on it's own the other had to have help but because I'd waited so long after momma got off the nest with her chicks it was to late to save the mal-positioned chick, luckily you had Butterscotch, my momma hen wasn't having nothing to do with the 2 day late chick she's incubated. so put it in temp brooder by itself, day time temps allowed to take it out for short periods, and it took me a week to get her to accept the late chick, but was more because the other chicks had accepted the lone chick.