Oh, my adult chickens used to get stalked by the cats, until one day, through the run fence, the cat and my BO stared at each other nose to beak. The cat's whiskers were all curled forward in that "really want to get this" mode. Buffy pecked that cat right on the nose. Just curious, actually. The cat almost somersaulted backwards. The other cat had the same thing happen with the Black Australorp.
Neither are the least bit interested in chickens any more. They actually walk past them, now that the chickens range freely. But the chickens are full grown...