I have had a chick hatch as late as day 26 so I usually give them until day 27 before I call it quits. I have had the majority of them hatch on day 23 once because of low temps. so definately don't give up.So sorry to hear. I may be in the same boat. No activity here but I'm gonna give em some more time. I think my temps were running a little low.
Anyone have experience with low temps/late hatches? When should I give up and candle to check them for probs? I don't want to do anything yet just in case we're still good here.