Just looked it up... he’s 3wks old is that to young to wrap?
And I can’t find any reason that he’d have it and none of the others (all related all on duck and goose starter)
Suggestions please and if I wrap how long for?
You can wait if you want, I wouldn't wait more than a week longer though the quicker you take care of it the quicker it fixes itself.
It's nothing you have done it's being thought of more often now as genetic so possibly one of his parents or grandparents had angel wing. Especially since they are eating proper feed for water fowl.