Lots! I found a couple for you.

http://www.fuzzyfaces.com/dgraph1.html
http://rats2u.com/clipart/alphabet/clipart_apets.htm
http://www.cybergifs.com/dogs/indexr1.html
http://www.caryn.com/francis/francis-graphics.html
http://www.uselessgraphics.com/dogs1.htm
http://www.workingdogweb.com/DogGraphics.htm

Not what you are looking for? Try here...
http://www.google.com/search?hl=en&i...e+Dog+Graphics