I wonder if someone dropped it off? my broody raised poults are not that tame @rjohns39 .. once I catch them they fight to get away the whole time.. but I only handle them if they get through the fence into the other pen.. of course they can't figure out how to get back in.
I guess anything's possible... I can't imagine someone getting up to my pasture without being seen/heard, but every other possibility I consider doesn't make any sense either.