Hello all! I know chickens are supposed to hatch in 21 days, but have any of you had them begin to pip on day 19? Of the same batch i started at the same time, i had one egg begin to pip 2 days ago (on day 19) but the chick still hasn't made it out as of today. I know it's alive because we can see his break moving now and then but its now day 21. Should i be worried about the very slow progress? Any feedback would be appreciated!