Well, I didnt cut them early because my incubator decided not to work at the last minute and that female incubated them which is probably why I had that problem in the first place. The ones that didnt make it had died in the eggs at least a week before the others pipped. They just ran out of room. If I was in your situation I would cut those eggs on day 50 or so but no earlier. I have one collapsed egg right now while the other eggs in the clutch are still full and round that Im going to cut in about 10 days. Too early and you run into the problem of them not absorbing the yolk or the color not being fully developed. They may be premies too.