I have a black australorp rooster, and for the most part he is pretty docile he has his occasional cranky moment though. But a year after I got him I noticed 3 of my hens plucking his tail feathers out. This past winter I noticed the tips of his wings turned white, not sure if that is common in a black australorp rooster or maybe he got frostbite although I thought that was just on his skin. But he has very few tail feathers and the skin underneath is red and irritated. Not sure what's going on or how I should help him?