I believe someone here has a Rhodesian Ridgeback, so they will be able to give you some advice. I remember seeing someone's photo of their Rhoddy with chickens. I just wanted to give a little general info, which you probably know since you researched the breed. I was a caretaker for some folks that had bred RRs for 25+ years. I took care of more than 20 dogs, plus pups. They were wonderful dogs, but since they were originally bred as hunting dogs, they were very prey oriented. If something moved, they were after it. That said, a couple of them were great with the family's cat, and one was so sweet that I think it wouldn't hurt a fly. I also cared for the family's large flock of ducks, and the dogs could not be anywhere near them.
Of course, these dogs were not socialized with poultry, and each dog has its own personality. Rhodesian Ridgebacks, in general, are a breed that needs constant reinforcement of the rules: they like to test to see if you are paying attention! There are exceptions, and I know someone will have a Rhoddy that is wonderful with chickens. This is just based on my experience.