How to keep female ducks from biting me?

[Muse]

We have this one little duck, she is a few months old, her name is Pistachio. When I hold her, sometimes she'll lower her head, make this small huffing sound and bite and pull my lip. She has made my lip bleed before. Why does she do this? What am I doing wrong? I've had her since a hatchling and she used to cuddle and follow me around, now she's big enough to be with our other 3 in the coop. Is she being territorial or does she just hate me?

 

[CarleeAnn]

I believe if over three months they can begin feeling like it's time to mate! My Ducks (now 4 months) love to nip at me, and each other. It almost seems playful! And they seem entertained at fabric and funny things in their bill. I have this very thin plastic tub that they love to "chew" on and make the water splash around. My husband encourages the ducks to forage through his beard and gives kisses (they also get carried away and bite the lips a little too hard.) I think, if the duck truly didn't like you it would pull away. And my Ducks make the weirdest noises, but you know your ducky better than I! It could be an uncomfortable situation and the older it get the more personal space it wants.

 

[chickens really]

Huffing and lowering the head is aggressive behaviour ...Dont pick her up anymore...In her eyes your bellow her in the pecking order so to speak...She is top Hen...Anytime she displays that behaviour chase her off a few feet...