My hen was the victim of an over-eager and clumsy rooster. By the time I got to her, he had pulled out feathers on the back of her neck/head and bloodied her comb. I just noticed that she also has a large gash under the feathers. It's about an inch long and bloody but not dripping blood. Advice on what to do for it? She's been isolated into my loo and is acting normal otherwise.