We found this egg just outside the coop door today and have no idea where it came from or who. We have 3 10 week old call ducks. 12 10wk old pullets. 2 8 wk old pullets. And 8 1.5 y/o hens. Two of the 8 hens haven't laid an egg in quite a while now maybe two months. Any ideas where this egg came from?