Can a hen raise a call duckling?
By "hen," do you mean a female chicken? If so, people have mixed success with that. Some seem to accept the ducklings and look after them, except they get upset when the ducklings inevitably go to water. I've seen others say the chicken started attacking the ducklings after they hatched. I can't remember what breeds of chickens were involved in the things I've read, but that might have something to do with it. Lots of people on BYC have both ducks and chickens, so I'm hoping some of them will respond.