"Would You Like Wings?": An Invitation to Transformation in The Magician's Nephew
It was the horse who chose Narnia, that much is clear. His name was Strawberry, and he had been in the middle of a long and troubling day. First he had been out doing his daily work with his cabby on the streets of London when an otherworldly half-giantess had taken control of him and made him her “royal charger” and then it was all galloping and crowds and shouting. Then a moment of rushing speed, and Strawberry and a number of human companions (and the otherworlder) found themselves in the wood between worlds. And it was there that Strawberry “shook his head, gave a cheerful whinny, a...
Source: tor.com