Hi, My pekin drake has lost quite a few feathers on his wings, mainly on one though, and they are looking a little mangy, just look like sticks at the end. See picture below. Sorry it isn't very clear. Is this normal ? He is nearly 2 years old. He doesn't live with any other ducks so he isn't being pecked at. He eats duck pellets, fresh fruit (grapes, apples) and veges (lettuce, tomato, mushroom) and I top his veges with brewers yeast. So I assume he isn't lacking nutrition is he? Please help!