Once she has healed then get her a good quality canvas saddle - the fancy ones can be too flimsy. Check under her saddle each week. Deal with the cock's claws, although they can still cause damage after trimming. If he is young ie a cockerel, he is likely to be full of teenage enthusiasm. He will calm down when he has a full complement of half a dozen hens to lead, and he realises he has no competition from other males. I don't think you need to dispose of him yet, just give him time to settle, and protect your wee hen.