I seriously had that happen with a duckling! Only sadly, the duckling was dead when I found it. But no one was broody at the time, and there was this dead duckling just mysteriously there in the duck enclosure. I cannot figure out how this happened! I feel bad I couldn't save the baby, too, but it's kind of hard to save a duckling that you didn't even know existed... It was not warm out, either. Still can't figure this out for the life of me.
Mystery (I think that's a name gonna stick) is doin well, she's not peckin her mirror too much. Really social, likes being held on chest, close to h'beat I think. No one else has turned up, so I think just raise her big enough inside to intro to flock. Oh and got another good idea locally for lonely chick......, old wind up alarm clock. I'm gonna have to find one, can only spend so much time each day holding a lonely chick to my chest in a 95deg attic. I'd post a pic but think I need more time on board. Thancks y'all, Ill keep ya posted as she comes along.