My husband & I currently have a trio of one year old hens. A coworker has a fairly large flock of a mixture of chickens & ducks, but ended up with more male ducks than he wanted. He asked if we would take one of his male Pekin Ducks. I don't know the specific age of the duck, I know it is less than a year old, but is full grown. We've never had ducks. Our hens were our first venture into poultry. We live in the city, so our girls live in a ~10'x20' pen in our backyard with a small coop we built for them. What do ducks require differently in the way of care? Will I need to be concerned about different feed, housing, etc? Do adults from different flocks usually get along when introduced? Thanks in advance for any advice!