That sounds like he was trying to mate her but was being much too rough since he barely knew how. I'm still sorry about your pullet though, no matter how he injured her.
Try not to be mad at your rooster. He was doing what came naturally to him, attacking the "threat" to "protect" his hens. He...
No I got an alt account because my other one was being annoying and I already wanted an alt account anyway! I kinda wish I had just changed my username though lol.