Magic Kitten: A Glittering Gallop by Sue Bentley
Flame the magical kitten must hide in the human world to escape his evil uncle but he can't stay in any place for too long. In every Magic Kitten story, he takes on a new guise and seeks out a child who is in need of his very special help. Zoe is not impressed that her mum has sent her away to spend the summer at her gran's house - she wanted to spend it horse riding at home. But when magic calico-coloured kitten Flame appears in the orchard behind the house, Zoe's summer begins to gallop by!