I found a mallard (I think) duck behind a local restaurant with no tail feathers at all, apparently she had been attacked by something. We captured her and brought her home to rehabilitate. I moved my other ducks temporarily back into the chicken coop at night so that she could have the duckhouse. Any advice as to what else I can do to help her, or how long it will take for her tailfeathers to grow back in? Also, she doesn't appear to be able to fly, but can she swim with no tail?