Diana Wynne Jones' Dogsbody
I wanted to reread something to test Goodreads' new rereading function, and it had been long enough since I read this that I didn't remember the details any more. Anyway, it is a lovely story full of stars and dogs and star-dogs, as the dog-star Sirius is convicted of a crime he didn't commit, and his sentence is to be reborn on Earth as a puppy! Can he save the day in a dog's lifespan, with the help of the sun and a sweet little girl? Will the story be delightful along the way? I mean, it IS Diana Wynne Jones.
Content warning for a lot of casual animal cruelty.