Art dogs are dogs (a.k.a. good bois) that can be found in art. When you visit a museum you can see lots of art dogs in the paintings, sculptures, photographs, videos, installations, prints, drawings etc. They are everywhere. Find an art dog in the Rijksmuseum's collection
There are many different art dogs including (but not limited to):
Art dogs are just like you and me. They like cheese and shuffleboard and Enya. They also like to make friends on the internet.