My son has been very busy designing and building sides and a roof for Penny's enclosure so this will never happen again. He's using cattle panels, so it'll be a solid barrier of protection from coyotes.
Once he's completed the enclosure he plans on getting another duck so Penny won't suffer from loneliness. He located a waterfowl farm in our state that raises pekin ducks year round. Apparently they ship them right after they hatch, so he'd be getting an itty bitty duckling.