My black cayuga has started this head bobbing thing lately and I can't figure out what's going on. A few details: She is around 12 or 13 weeks old and by the extreme volume of her voice I'm guessing she's a girl. She's the lead duck over 2 others, although not in a bullish manner. For the last couple weeks, whenever we go out to see her, she bobs her head up and down quite rapidly, like she's trying to see us but can't get a visual. I've seen her do this in her pen when she's looking through the wire and in the yard. It only seems to happen when a human is around though. She's also started getting friendlier. When one of us approaches she'll bob her head up and down and then lay her head close to the ground and come close to us. She'll even let my husband pet her, which is completely out of character. The other two haven't exhibited any of these signs. I don't think anything is wrong with her eyesight, as she goes after food just fine and leads and follows the other birds around. She doesn't run into anything either. Does anyone know what this is? Since she's getting friendlier is a mating behaviour? I don't see her do it with the other ducks, but I've heard of rabbits falling in love with humans and doing their little dance for them. I am really curious as to what's going on. I hope nothing is wrong.