Well they could still think like humans and they could still communicate in English (telepathically), so they're sort of human characteristics. They're not physical, but do they have to be physical characteristics for it to be anthropomorphism? Because that's how I would imagine myself as an anthropomorphic character - completly like an animal physically, but with a human brain and some way of communicating.
I remember back when I used to read these books (and I loved them!) I would always daydream about having the ability to turn into animals...
Speaking telephathically is not a human trait so could it be considered a human characteristic? :chin:
It's debatable eitherway, boils down to personal preference on what type of anthropomorphism you enjoy, whether it be psychical or not.