So @Mrwaffleman - I think you have done many things right. Some ducklings do seem to be more prone to certain developmental problems than others, so it looks like your little one is one of the sensitive ducklings. But beautiful!
Some swim time in a tub of lukewarm water (constantly supervised at this young age), so the little can take weight off the legs, and improve circulation is what I would do. Is the feed chick (starter) or adult chicken feed? At this point, regular chicken feed is probably fine, with some additional supplements.
A note about wrapping the wings - please be careful not to cut off circulation. Also, from what I have read, ducks with angel wing can have fine lives. This little one is going to be an indoor pet, so that takes some of the worry out of the situation.
The legs are a bit more of a concern.
If the duckling is indoors much of the time - and I defer to the indoor duck folks here - you may want to supplement just a tad more with vitamin D. @Amykins do you do that for your two? I would definitely think about the Vitamin D connection - since that affects bone growth in humans, I am pretty sure it would also affect ducklings. My dad had rickets (Vitamin D deficiency), by the way. And he turned out okay after that was addressed.
I would back off on the protein for now - as they get older, ducklings need less, anyway. I would not stop entirely, actually. Again, niacin is found in animal products. Brewer's yeast is better at providing B vitamins (including niacin, B3) without adding so much protein, so that would be a better source for Bs.
And just keep loving the little! We have a special needs duck who had nutritional problems early on, and the main things we are doing is feeding her as well as we can, and giving her exercise, and companionship and fresh water. Right now she sinks like a rock in water due to her feather condition. But she's with Runners, so she's getting her exercise! She has a wing problem, too, and that may or may not resolve itself. Even if it does not, she's a domestic, not free-ranged, so we are not worried about that. Just saying that in this case, we have a bit in common.
Thanks, all for tagging me.
