Ever count your chickens when they come back in for the night and you're missing one? You look all over, give up, shut the coop and in the morning, he/she is back? Lol. This happens to me all the time.......don't know if I'm miscounting or they found a seriously small and weird place in the coop to hide. A couple years ago, I swear there was an addition to my flock because I knew how many of a certain breed I had and I ended up with one more. I'll never know if someone dropped her off or if I'm just crazy.