Oh and just a note. I never crack open my left over eggs, I candle, and if I don't see movement or I see too much free space, I just toss 'em.... That is if I am on day 24 or later. I prefer not to know. And a lot of times the eggs that don't hatch, didn't for a reason, the 1 I helped once had a severe leg deformity, and Hubby had to Cull it, so now I just let nature take it's course, and toss the left over eggs after day 25.