Angel wing on my angel?

[OzarkEgghead]

Hi, everyone! I have never had a young duck with angel wing but I'm concerned that one of my little Silver Appleyard angels that hatched on May 12th is developing this. I've raised them on Homestead Duck & Goose feed as I have all of my other ducklings & I add nutritional yeast for a little extra kick of niacin. The photo isn't the best as they all wanted to group together but does that look like angel wing? It's more obvious from the rear like this than from the front.

 

[casportpony]

That does look like it might be angel wing. Let me go look for some treatment info.

 

[casportpony]

I like this video:

Source: https://www.backyardchickens.com/threads/angel-wing-treatment.1252014/