Alex sounds like she may have put up a bit of resistance to a roo's advances, though. Favorites will often just drop down and let what it going to happen, just happen. A hen/pullet that is reluctant is the bird most likely to have some damage inflicted on them.
My most impressive spur...
Alex is molting. She's a bit young for that, but if your roo is damaging feathers, then the body will replace them. Speaking of the roo- he's rough. That is classic roo damage from a bird that is too aggressive with his girls. You are going to need to watch that. Keep an eye out for...