He has deeper issues than that. He's about a year old, just the right age to have been some childs cute little yellow Easter present last year. What I suspect is he outgrew his cutness and started to dominate everybody in the household so they dumped him. Because he suddenly turned up at my friend's farm and instead of staying in the pond with the other ducks he hung around their back door attacking everybody that came & went. I went over to help him fence a horse pasture and the duck approached me showing his crest, hissing and wagging his tail. I said "Hey duck" and reach down and scratched him on his back. The rest of the afternoon he followed me around like a puppy. So for fixing my friend's fence, he paid me with....a 6-pack & a duck.
Took him home, follows me around like a puppy, sits on my knee & wags his tail. Attacks everybody else. Started out as sneak ground attacks from the rear, progressed to full frontal ground attacks, now conducts full aerial assaults from a distance. He lands on victim, holds on with his bill, claws them and beats them with his wings. He has almost a 4 foot wingspan. It's like getting attacked by a flying pitbull. Wife said next time he attacks her she's shooting him. But he follows me around like a puppy and sits on my knee. When he gets in my way I say "YOU BETTER GET OUT OF HERE YOU STINKIN DUCK!!!" and all you hear is his big webbed feet going flop flop flop as he runs away.
Not only is he a nuisance, he's downright dangerous.