I've been searching for information on "pom-poms", glad I found this site! I bought 3 female runner ducks from a local "feed and seed" store about a month ago. I just ordered white Indian runner ducks- I had never even heard of runner ducks being crested. After about a week, one of the ducklings began developing a tuft of hair on the back of her head. Since then, it's grown quite a bit and now looks just like the crests on the ducks I've seen pictured here. I have no plans to ever breed any of the 3 ducks I have, but now I'm worried about her health. At first, when I felt her head, it felt totally normal under the little pom pom. Now, at 4 weeks old, I can feel an extra sort of flap of skin under there. She is a little smaller than the other two, but hasn't had any seizure activity, stumbling, or anything like that. Is there anything I should be doing extra for her (diet, vet care etc)?