I have no idea who the artist is, but this very long dog mural is located on the wall along the Metropolitan Branch Trail, a rail line running from Maryland through DC that has a very popular trail for hiking and biking running alongside it. Seems pretty appropriate for the nearby dog park.

Best to view in "Original" because other versions resized by Pbase are decidedly
unsharp.

Here’s shovelin’ at you, kid, posted earlier: