Today only one wing is like this. Just a few feathers sticking out. Yesterday it was both. I'm sorry for the quality of pics but it is the best I could do.
It’s kind of hard to tell but yes it is sudden and it’s just like a few feathers are sticking out sideways and this is the only one that has it out of 8.
Do older ducks approximately 18 weeks get angel wing? I noticed one of my babies tonight has a few feathers sticking out on each side. I tried to get a picture but duckie was having no part of it. I'll try again tomorrow if it still looks odd.