Mickey Mouse and Pluto Pup

Mickey Mouse and Pluto Pup is a book in the Little Golden Books series.

Summary
When Pluto goes missing, Mickey Mouse takes a drive to look for him. Donald Duck, Goofy, and his other friends haven't seen him, but they all volunteer to help him look and hop in his car with him. They finally look in the Dog Show and find Pluto being awarded Most Popular Dog in the Show.