I really do think it's fine that she is playing this way...after all, she is still just a puppy - and it IS her toy that she is doing this too - not a human
My Stedman shakes his head so hard and growls at his toys when he really "gets into it" - however, he ONLY does this WITH HIS TOYS and nothing else and certainly never to a human lol. I think it's cute and not to mention, hilarious