I have an ancona duckling about 2 and a half weeks old who got caught in a fence. I looked him all over and the only injury I see is a patch of skin about the size of a dime missing on the back of his neck. It's oozing blood a little around the edges when he moves it. I rinsed it off, there's no debris and no jagged skin. What, if anything, do I need to do? Is it better to give it air? Or wrap it up? Do I need to put some sort of topical on it? Thanks!