My ducks have become completely the most aggressive animals I've had... and I have a rottwieler! The males slowly sneak up behind me and... nibble at my jeans. They can't bite worth anything, but they try. They CAN bite a little harder, but they won't bite me too hard because I feed them. The females won't let us come near them (except if it's feeding time!). I don't usually pick them up so Kuro (black swed.) and Baka (runner/buff) are still a little shy. Kupo (runner/buff) and Momo (black swed.), however, are not. They are always watching and are ready to attack anything... even if it is the hand who feeds them. I've noticed that they won't bite me (or my mom) head on. They have to sneak up behind us. Everyone else though.... I get to pick them up a lot more, though. They'll just waltz right up to me and let me hold them. They're really sweet once they're in your grasp. I like to feel the feathers on Kupo's pom-pom!! DUCKY-MANIA!