Wait...isn't this the scenario where Bella was telling Blu she was "interested"?My boys started doing that when the flock reformed after breeding season was over in September. The lower ranking cock will do that as a submission gesture to a higher ranking male. They also have this squeaky, sighing call that goes with it. My submissive females who are getting challenged will instead either hunker down and be pecked or run a more respectful distance from the dominant bird.