Nothing like the voice of experienceBesides there is NO possible way to keep the goats from eating the ducks food. I mean NO way. I have goats and ducks. If I do not pick up the duck food, there is a goat in it immediately. Therefore, I have fat goats. Grrrrrrr.
I would not house my ducks and goats together. Ducks are way too messy. Goats are not all that tidy either, but the duck poop is so sloppy and if they poop in the goat water, and the goats can't drink it, then that's a whole other issue.
My goats can be out and free ranging together, they are fine, but feeding and housing needs to be separate, imo.

Wow! veronicasmom. I had no idea….