My hen is currently sitting on nineteen eggs (yeah, I know, that's a lot. I didn't realize until I actually counted today) and today is either day nineteen or day twenty. When I went outside and looked under her and lifted up a few of the eggs, I heard no chirping from within (except maybe a soft "popping" noise but I could be making that up) and from an outward appearance without bothering any of the others, no one had any little pips in them . I really hope they are okay. At what day do most eggs begin to pip?