Two Muscovy Ducklings (6 weeks old) vanished from our nicely fenced (read coyote proof) area last night. The remaining two are fine. Big old crows are hanging around and did spend the spring lunching on Muscovy eggs and chicken eggs from the barn. (We watched them fly off with them in their beaks!) We've had owls kill poultry and rabbits previously. So, I think we need a covered pen. What is cheap, easy, big, and moveable. DIY is fine. Thanks for your help. So glad to join this forum and turn sadness into action.