I live in a condo in Miami and a nice sized Muscovy likes to show up a few times a week. This duckie loves visiting my back porch as I always have treats for him. One thing I've noticed lately is that his wing feathers are very very thin. I can see his plumes, and in some places they show through fully. He's a wild duck, and I can't touch him, as friendly as he is. He's on the cautious side and I'm happy for that. Are there supplements I can buy to give to him for his next visit? You can see his bare feathers a bit better here. He is very big, like a turkey.