Where can I find a downloadable photograph, piece of clipart, or
graphic depicting a dog chasing its tail?

Hello, Snugglewampus!

I've found five photographs of dogs chasing their tails:

Golden Rescue: Magnum Tail-Chasing
http://www.golden-rescue.com/images/Magnum_tail-chasing.jpg

Arizona State University: Tikka Tail
http://www.public.asu.edu/~aknudson/graphics/tikka_tail.gif

Vicksburg Online: Tipper
http://www.vicksburg.com/~bryant/images/tipper5a.jpg

Royal Veterinary College: Behaviour
http://www.rvc.ac.uk/Hospitals/QMH/images/behaviour1.gif

Expedition Samoyeds: Spin
http://www.expeditionsamoyeds.org/Images/spin.gif

This appears to be a photo of a rather odd oil painting:

Ken Bailey Studio: Chase Your Tail
http://www.studiokenbailey.com/cahse_your_tail_blue.jpg

Here's a cute piece of clip art:

Canada House: Dog Chasing
http://www.canadahouse.com/dynamic/images/thumbnail/21_145_DOGCHASING.jpg

And finally, two really funny cartoons:

Software Magazine: Images
http://www.softwaremag.com/archive/2001feb/images/ChasingItsTail.jpeg

System C Healthcare: Dog Chasing Tail
http://www.systemc.com/images/Dog_chasing_tail.gif

My search strategy:

Google Images, "chasing tail"
http://images.google.com/images?q=chasing+tail&ie=UTF-8&oe=UTF-8&hl=en

Google Images, "chase tail"
http://images.google.com/images?q=chase+tail&ie=UTF-8&oe=UTF-8&hl=en

Thanks for asking an enjoyable question! If any of the links above do
not function, or if anything needs explaining, please ask for
clarification.

Best wishes,
pinkfreud

I searched clipart sites for an hour and 1/2 and found nothing close.  Thanks!