One of my ducks has a really bad limp that has been getting progressively worse over the past couple of weeks. It isn't yet preventing her from getting to food and water and she still forages around the yard during the day, but she definitely tucks it up under her wing as often as possible. Are there any preventative measures that I can take to keep it from getting worse so that I don't end up with a vet bill? I would really appreciate any help at all! Thanks!