Cesar Contreras Pina of Oxford Pa.. took this series of photos sent in by his wife Tara Ziegler.

This is a picture of our 2-year-old Cane Corso, an Italian mastiff named Angus, aka Gus, and our 5-year-old son, Samuel," said Ziegler. "They enjoy going for walks together."

Any one of the series could have won as a single photo, but together they show a wonderful progression, each with great expressions of the fun he's having on the face of Samuel as well as the expressive faces of Gus.