Yes, I have white&buff silkies with my ducks&standard chickens. They roam around, eat, drink, & sleep together. No problem. There is even a younger buff silkie&guinea in there with them too.
My other standard chickens come from their coop & hangs out with them too!
Also, I have three baby white silkies&two baby ducks brooding together.
Hope this helps!
-Cody