So last year, I met a wild duck that seemed... a little... off. She hung out with the local geese and was helping them with their goslings. We named her Quackers. Fall came, and she left with the other migrating birds. Well, this year she came back. After some intensive googling, I discovered she was a Swedish Blue. And that she was supposed to be a domestic duck - not wild. She did manage to 'hook-up' with a mallard, (My backyard is a very large marshland/creek.) and has one beautiful baby following her around. The 'baby' is nearly full grown at this point, and looks like a Black Swedish - so far no mallard traits are really coming through. So the issue is - these ducks are supposed to be domestic, not wild. They have been hanging out in my yard about 80% of the time, and seem to be hungry. They approach me and cheep or quack as if they are trying desperately to tell me something. And I'm growing attached. Also, I'm worried about natural predators, like snakes, cats, heron, etc. So I am building a duck coop. It's going to be 30"x18", 24" high in the front sloping to 18" in the back, with a hinged roof and sawdust bedding. And 18" off the ground. I don't plan to fence them it, but I'm planning to encourage them to use it for sleeping and shelter. If anyone has any advice for supplemental feed, (I read the master list of duck treats, so I have a bit of a starting place) or any other general advice on what to expect, please let me know!