Trouble with Pteranodons — Scott E. Sutton

In book 3 of The Adventures of Dinosaur Dog paleontologist-in-training Banjo and Lee travel back in time to explore an island of Pteranadons. These flying dinosaurs are almost as scary as their smart new neighbor, Samantha Berks and her big mean cat, Bootsie. When Dino, the Cho Chow dog, and Bootsie make a peace treaty and Samantha discovers their secret time tunnel, it looks like the science team will have two new members whether they like it or not. It could be a good thing because on this adventure they need all the help they can get!