Very late hatchers on my end as well. Day 22, 23, last one today at day 24. Of note, a lot of day 18-20 quits. Particularly in the saddle shaped cells. Overall, there seemed to be issues with slow reabsorbing of the yolk and blood supply. Interesting, given my earlier notation that the blood supply was not as vigorous as expected. I think as a whole they developed much slower than "normal". I also had a lot of assists/malpresentations. Many with the head positioned between the legs, not under the wing. Two wrong end pips. Out of the entire batch, I had 5 "floaters" hatch with the rest being late quitters. Interesting experience, I think in the future I would avoid even setting those eggs however. Far too many assists to make it worth trying again.