K i candled my eggs after day 21 to see waht was going on the broody hen dosent mind me touching her but i candled 1 and the veins and the aircell are gone and the egg isn't fully black ethier which is weird cause on day 18 it had a aircell and the egg was completly black with i little bit of veining imbetween the aircell and the blackness and the 2nd egg i candled was black with air cell and a little veining i herad they lose the aircell and veins when there ready to hatch plzz help is the first egg dead