Hi! I need some advice. I have an incubating pigeon egg(I found it down our alley just lying on the ground). It just hit day 0 today. I have noticed since I came home from work that there is what looks like a dark smudge on one side of the egg. It was NOT there this morning. Please can anyone tell me if this is normal during hatching? I saw on another Internet page that it might be wear the bird's claws have scratched the membrane and caused a small tear but that was in relation to a duck egg? The last time I candled the little guy was moving about and all was well.