My swedish blue duck is losing feathers

[krazykoolkat]

As the title says, one of my blue swedish ducklings (around 12 weeks) is losing hair,but the thing is, the other isn't. Here's some photos, I dont think the other was attacking my first one and they are both male

 

[Quatie]

12 to 13 weeks old is when they molt into their adult plumage. This is more noticeable with some drakes, because their color changes and they get their drake curl. With females, it can sometimes be a bit subtle to tell they are molting.

Unless they have other symptoms that suggest something else is going on, I would assume it is their first molt.