Good morning!
How old were your birds when you got them? They will USUALLY go through molt around their second winter season in life. Though they often molt when their bodies decide and don't get the memo about when they SHOULD.
Looks like she has some pin feathers coming in, so it very well could be molt. Sometimes it is brought on by daylight/weather. But a stressful event could also induce it. I am also in the process of getting rid of my ducks before issues develop.
During molt I like to offer a little extra protein (than layer) since feathers are made of 90%, the amino acids and such that the protein contains. I also use a flock raiser and offer my oyster shell on the side since girls who aren't laying don't need the extra calcium. (Though plenty of people never change their feeds and also don't experience the issues I'm looking to avoid by doing so.) So I would expect to be not getting eggs from that gal also since they don't lay eggs while their body is using the energy to generate new feathers.
I bet she's a pretty girl when her feathers aren't all tore up!
I see a little copper in one of the pics. Is she a Marans? Looks like a little white/grey on her, indicating she probably is old enough to molt. And also her comb looks kind of pale, which is an indicator they aren't in lay... and therefor are;might be molting.
She looks confident and comfortable/energetic, so I wouldn't think injury.
