I'll just copy and paste the description I typed up for the youtube video: Here's video: http://www.youtube.com/watch?v=RmJE9uVdgAk So I finally let the duck (Willis - who's not even fully grown yet) free roam with my chicken (Miss Peach). We have two brittany spaniel dogs (known for being instinctual bird hunting dogs). They've come to let Miss Peach roam the yard as she pleases (although they harassed her at first), but Willis and Miss Peach have become bff's, so naturally, Miss Peach walked into the yard, and Willis innocently followed for the first time ever. Our dogs proceeded to attack him. Willis took off and flew around the house three times, only to land in the middle of the yard again, where he continued to be attacked. He barely got away and ran into bushes (outside of the dog's electric fence range), and sat there panting and hiding for at least an hour. The next day we let Miss Peach and Willis out again. Immediately, Willis spotted the dogs and made a beeline sprint/run/fly directly at them. He rammed our one dog in the side and she took off with her tail between her legs running to the porch. He then grabbed our other dog by the side with his bill, and proceeded to attack the second dog. Our dogs are now officially petrified and won't even walk into the backyard anymore, because the few times they have since, Willis repeats his methods until they've run off for good. I've seen ducks get defensive, but I can't say I've seen anything like this. He's completely cool with anyone/anything else ... but the dogs come nearby, and it's game over. This video isn't the first attack. After him doing it twice, I took the camera out to see if I could catch him in action, and he certainly didn't disappoint. My parents are all concerned for our dogs, but as far as I'M concerned, Rambo said it best; "They drew first blood!!!" Long live Willis! ... and Miss Peach! So, I've seen a few videos of ducks being somewhat aggressive, but Willis actually goes out of his way to attack the dogs now. It's actually pretty amusing. We can't even let the dogs and duck out at the same time anymore. Willis takes no prisoners! Thoughts? / Recommendations? / what?