I have around 60 in various stages, a broody hen is due on Thursday for her batch of 5 and then some black copper marans next week Thursday. I thought waiting for eggs to hatch was bad enough the way it is but with those black coppers....there's no way you are seeing anything in them. I was able to sort out 4 clears based on the whole egg glowing but the others are just completely black, hopefully that's a good thing!!!