Hi there, I am a new duck owner, I have a blue swedish and a cayuga, 2 weeks old both are not sexed. I have been working with them daily and taming them, hand feeding, etc. Today I began teaching them to "come" when called. After this I was sitting and my blue- Quinn, decided to snuggle up in my lap voluntarily and rest her chest against my hand. Later my cayuga- Barnaby decided to join. When Barnaby left, Quinn stayed in my lap (I was not holding Quinn in any way that would require her/him to stay) but Quinn's beak/head began vibrating here and there. I looked into this in other forums- but most responses are suggesting this is a territorial/mating behavior which in these circumstances I would not assume true. Any one have any suggestions or experience with this behavior? Here is a photo of how they were snuggling before Barnaby left and this happened.