Lower the amount of protien in their feed, I would go with unmedicated chick starter, is typically 14% (or less if you can find it) and maybe even cut whole oats (no additives) . Also wrap gentley with the self adhesive bandage wrap so wont stick to feathers when you remove it. Also dont wrap too many times or will be too heavy for them to carry and lift its wing. I wrapped my goose wing 2 times around and only wrapped the wing, I did not wrap it to the entire body as some do; I think which ever way you feel most comfortable with. I'd check it in 7 days check and if leave off for a few hours and if corrected good, if not wrap again and wait another few days. My goose had it on for two weeks I think, but I did change the wrap one time when I checked it. good luck and Miss Lydia your ducks are soooooo beautiful.