pho·to·bomb - verb - to spoil (a photograph) by unexpectedly appearing in the camera’s field of view as the picture is taken.
We've all seen it—a perfectly posed photo with the group looking just right, then out of nowhere, an unplanned visitor sticks his or her head in the frame. At the Lockport Modern Mothers Club picnic in 1956, that unplanned visitor was a dog, front and center.
Congrats, dog, you're in a book! Or to be more specific, you made your way into the Lockport Memories pictorial history book.