My Rouen/Khaki Campbell mix duck is getting really aggressive. He's about 8 months old and up until a few days ago he was the greatest pet, letting me pick him up, pet him, and otherwise just love on him. Now he's biting my feet and hands, and he broke the skin today on my hands and caused bleeding. I can't help but think it's partially my fault because the day before he started doing this I had bare feet on and was letting him play with them. When he started nipping at them I would jump back, playing with him, and he would run after them. The next day he was biting harder, and that's how it's been progressing. Also, I just started clipping his wings so that he couldn't fly out of the enclosure because he had been going into the woods. I think he might just be playing, and since he hasn't been able to be out foraging in the yard, he probably has a lot of energy. But I really can't just let him out because I'm afraid he'll get eaten while he's in the woods, or stay too far out. Please help! I really don't know what to do! I love Percy, he's always been one of my sweetest ducks, so that's another reason why I think he might just be playing, but how do I stop this?