Just to follow up, Vim hasn't bitten me again, and it's been a month. So all good things and thanks again for the advice. A few times I've hit a sore quill and she's lunged, but it looks like she catches herself mid-strike and instead just bumps me with her beak. Each time I tell her "Good girl," which is our reward/treat term, in an attempt to encourage this good communication (i.e. a beak-bump is enough to get me to back off). I think she's young and still learning to communicate with me, and of course I'm still learning to understand her communication. I continue to be amazed at how quickly she learns and how much she understands.