2 month old muscovy has something wrong with its wing

[chickens really]

Can another duck break the wing from pulling it? Or pecking at the wing? I caught the 2 females doing the most pecking! I extended the wing and it doesnt seem broken. They havent been anywhere but my bathroom and locked in their playpen at night. No older ducks around or anything just the 5 muscovys that hatched together. I was shocked when i woke up to blood and the wing not laying right. I first thought blood feather but when i looked i cant find the broken feather! I wrapped the wing haven't taken the wrap off yet plan on the today.

Yes because the cartilage is soft at the joint.

 

[Gray Farms]

I agree with @Miss Lydia, it looks like early stages of angel wing to me as well.