So are these an earlier model? Cause the video here shows him with much more advanced looking feet:
http://www.popsci.com/technology/article/2010-06/british-amput ee-cat-first-get-bone-grafted-exoprosthetic-paws
How much money did it cost the owner to put $.50 worth of plastic and foam onto those rusty stump staples? I'm going to bet it's somewhere in the ,000 range.