This is one of those encounters in Alice that’s often entirely forgotten about when people adapt the books.
It’s a shame, because it’s a surreal, odd and quite poetical little scene.
Just then a Fawn came wandering by: it looked at Alice with its large gentle eyes, but didn’t seem at all frightened. ‘Here then! Here then!’ Alice said, as she held out her hand and tried to stroke it; but it only started back a little, and then stood looking at her again.
‘What do you call yourself?’ the Fawn said at last. Such a soft sweet voice it had!
‘I wish I knew!’ thought poor Alice. She answered, rather sadly, ‘Nothing, just now.’
‘Think again,’ it said: ‘that won’t do.’
Alice Through the Looking Glass.