I think you're fine just as you are, if everyone seems happy. A duck raised with chickens can be perfectly happy living its life with chickens. She may never use your main pond, but if you're okay with her sticking around with the chickens, then there's really not a problem.
My ducks take a long time to start using the big pond at the bottom of their property. They get really comfortable with their circumstances, and are reluctant to change things even for the use of a several-acre-large pond. They *do* use it eventually, but not till they've lived her a long time.
My ducks take a long time to start using the big pond at the bottom of their property. They get really comfortable with their circumstances, and are reluctant to change things even for the use of a several-acre-large pond. They *do* use it eventually, but not till they've lived her a long time.