Guru Guru Pon Chan volume 7
Ponta is a Labrador retriever puppy, the Koizumi family's pet. She's full of energy and usually up to some kind of mischief. But when Grandpa Koizumi, an amateur inventor, creates the Guru Guru Bone, Ponta's curiosity causes trouble. She nibbles the bone -and turns into a human girl!Winner of the Kodansha Manga of the Year Award!