Meet the real-life dog who dug up dinosaur bones in this adorable nonfiction Level 3 Ready-to-Read. There once was a little dog named Tray. He lived in England with his owner, Mary Ann Anning. Tray loved to dig for dinosaur bones. Together, he and Mary Ann found small bones, big bones, and even entire skeletons! People came from all around the world to see the bones they found.