I got my two White Rock hens and my Kahki Campbell duck on the same day in July when they were all just bitty babies. They have lived together all their lives. When you keep chickens and ducks together, you can't use the usual chicken feeder and waterer because the duck can't get his mouth in there~ the "dishes" need to be wide open. Ducks need water to eat, and they do make a mess but if you put the water bowl inside a larger container such as a galvanized turkey roaster pan, it's not bad. I'm using the deep litter method and will change out wet litter about twice a month- no big deal. The duck eats the chicken "maintenance" crumble plus some sort of greens every day. I just threw out a bunch of collard and mustard green seeds in one area of the garden and it grows without much input. One thing- if you have a male duck with the hens, I've heard he may drown a hen in attempting to mate. I have taken the little pond out of the run, now that I know the duck is male. He can swim on the decorative pond when he's out freeranging, under supervision.