I candled my turkey eggs at 7 or 8 days last night. I was not impressed. 5 out of the 6 I couldn't tell anything. couldn't make out any veining. One I saw the inside sloshing around. I cracked it open in a dish. It was an infertile egg. I hope the rest are viable and alive and I just cant see it. I'll check them again when I candle the chicken eggs when they are about 7 or 8 days into it.