The Direwolves are the most important characters never to speak a word in Thrones, digging characters out of deep holes on a number of occasions throughout the seasons. But once Arya's wolf Nymeria was no longer needed for the show, the producers re-used the dog. Maisie Williams posted on Reddit: "After my dog finished playing Nymeria, she actually went on to play Shaggy Dog, and they dyed her. She was the best behaved dog out of all of them, so she ended up playing all the other wolves, even though she was mine originally."