I candled all of ours and used an LED flashlight and on day 7 could SEE BABIES in there!! viens at the least in all but a couple and BABIES in most with the p-nut shaped little things wiggling around and you can see the EYE! everyone said you can and I was amazed! I numbered each breed and am writing down what I see in each egg so that NEXT time we candle we know what THAT particular egg did last time. Prolly a bit much but ah well. I'm prolly overthinking it all but again oh well. I have noticed a couple with aircells that are moving lke if you tip the egg then it slides along under the shell,since I understand that is bad and the only chance for these peeps is to hatch out in an egg carton, I'll do that for the ones that are compromised from shipping.! will send pics in a abit!