The reason I ask is that I have a egg that is growing mold but still alive. Daily I wipe mold off of the egg. It collapsed some that day I put it in my incubator then started to mold. I had one other egg do the same thing and it died. Both eggs were roll outs, and the other eggs in the clutch are fine. So I candle it every week to make sure it hasn't died. I've wanted to treat the mold but I read all the forums and see donts and do's and I have just been wiping it off instead. I just don't want to stress embryo inside egg, but I also don't want to be incubating a rotting egg with good eggs so I candle it.