My welsh harlequin, in the back, has been moving a bit slower then her sisters. And she lets her wing kind of hang, as shown in the picture. She tends to leave the other ducks and just sit by herself a lot now. I checked her out and her eyes and nose are clear. She seems perfectly fine but the wing droop and the antisocial behavior arent typical. She was the ringleader and theyd all follow her everywhere. What do ya all think?