What a beautiful duck, the khaki campbells are so pretty. I think your duck may have imprinted on the chickens so unless they fly away, I don't think the duck will. Heed what sumi said about male ducks. Duck anatomy is quite different than a chicken. They can kill a chicken hen trying to breed her. Ducks really do need a little kiddy pool or something to swim in. I don't think chickens will follow them in.
Often chickens hatch duck eggs and are distressed when the babies head for water - but the hens don't follow them in. If you can figure out what sex your duck is, then you could get a mate for it.
You may want to post photos on the duck thread and see if they can tell.