i've been finding blood spots in a couple of my eggs ..i thought maybe it had something to do with the roo dancing on their backs to often ..it didnt seem like i found any blood in my eggs till i got him ..is the blood a sign of something wrong..Those eggs look fertile but the blood is meat spots.... not development. It will happens sometimes with chickens, they can get pretty big and kinda gross. I have seen them with blood in the white and big globs about the size of a lima bean of bigger.