I set a hatch the exact same day as you, in a HOV-aBator 1588 (GQF) Most of my babies hatched all during the day yesterday, and a few early this morning. I opened the remaining eggs today to find fully formed chicks that were dead.
I did some research, and from what I found, it's likely that my humidity was too high. I did have a hygrometer, it was a 70-74% the last 2 days, and I didn't know you could go TOO high.
I would recommend opening a few eggs to see what's going on. You may save a few, but likely you will find weather they were formed, or not. If you gently use a sharp knife to poke a hole in the larger rounder end, then peel back a little shell, you won't get messy, and you can see what happened. If you see yellow, and smell a strong smell, the egg was likely not fertile. It's good to troubleshoot so you can improve next time. HOpe that helps.
I did some research, and from what I found, it's likely that my humidity was too high. I did have a hygrometer, it was a 70-74% the last 2 days, and I didn't know you could go TOO high.
I would recommend opening a few eggs to see what's going on. You may save a few, but likely you will find weather they were formed, or not. If you gently use a sharp knife to poke a hole in the larger rounder end, then peel back a little shell, you won't get messy, and you can see what happened. If you see yellow, and smell a strong smell, the egg was likely not fertile. It's good to troubleshoot so you can improve next time. HOpe that helps.