i love ridgies. spectacular dogs.My dogs are never out with the chickens intentionally. Once the dogs got out when the chickens were loose, a few other times a chicken has escaped the run.
I own a high prey drive breed (Rhodesian Ridgeback). I adore him, but he definitely has to be carefully managed around small interesting animals. It comes with the territory.
we have free range dogs in the Philippines, we need them to protect the property. fortunately we have not seen them ever go for a chicken. if it eventually happens, we will have to constrain the dogs or the local chickens. I hate to do either.