You said one of the wellies were hitting on the girls. If you're talking about the dance where they drop one wing and prance around, that alone is enough to trigger an event. Your dominant roo watches closely for behavior like that in order to stop it. It seems interrupting them isn't enough, he also has to rough them up. I would say that roo definitely needs to go. If your goal is to breed them, that's not a good trait to continue. I recommend dumplings.