I have a year old peking duck, my boy friend found her two nights ago exhausted barely keeping herself afloat in our pond. He fished her out and she went into the duck house for the night. Today I find her again sinking in the pond. I fished her out... she is not injured in any way, healthy, quacking and hanging out with the other ducks...she can't seem to lift herself up to get over the pond's edge.. they have a ramp to get out of the pond but don't use it at all... the only thing I noticed is she has no wing feathers! Is it possible she is molting? or is there a more serious underlying problem here? I tried to separate her but it totally stressed her out... so she is back with the rest for now