I do apologize for the delay in answering your questions. Charley just wrote a post that may answer your question about chickens and ducks living together, Duck Houses.

I’d like to answer your question about what we feed our ducks. First, our ducks are free range. They have a very large area to find natural foods like bugs, snails, grasses, etc. They have several ponds and creeks where they can forage on the bottom. To supplement their forage I give them a variety of grains & seeds like oats (including oatmeal), wheat, spelt and sunflower seeds. They also get scratch grains which is just corn & wheat berries. They love scratch and will gobble it up like candy. In the summer months, it is not necessary to feed them a lot of extras so during that time of year the scratch & other grains are more like treats.

You can find more on feeding ducks in my post The Care of Ducks

Thank you for your inquiry and I hope this helps!

Susan