Very touching and absolutely believable, though the recognition of the girl after a period during which she had changed was impressive in itself.
Naive anti-anthropomorphism is IMAO no more defensible than naive anthropomorphism. I have seen too many examples of unrelated animal species, both wild and tame, young and old, sponteneously interacting as though they were conspecifics, for me to be able to reject the significance of such behaviour out of hand.
People who regard it as an Ockhamian virtue to think of such interaction as insignificant or logically invalid, understand the significance of Ockham's principle no better than they understand biological interaction.