William Wegman

Wegman photographs his dog own Man Ray, with whom he began a long and fruitful collaboration. 

Man Ray, known in the art world and beyond for his endearing deadpan presence, became a central figure in Wegman's photographs and videotapes. In 1981, Man Ray died. It was not until 1986 that Wegman got a new dog, Fay Ray, and another collaboration began marked by Wegman's extensive use of the Polaroid 20 x 24 camera.  Wegman has also published a number of books including Man's Best Friend,  Fay and The New York Times Bestseller Puppies. 

http://www.wegmanworld.com/home.html