I have a 1 1/2 year old female Muscovy duck who looks horrible, She only comes out of her box to eat and then goes right back in. Up until 2 months agol she looked great and would go into the water and play and act like a "normal" duck. I have 5 other ducks and they all look great so I know it's not their diet (I feed them layer crumbles and a small amount of cracked corn). Can anyone give me any suggestions on what to do for her? Any suggestions would be appreciated! Thanks, I have posted some pics below.