I had my craftstore order this hilarious set from Art Impressions (catastrophy), mainly because of this stamp..I'm a lamp...rofl
Luckily my cats never had to wear one of these, my vet doesn't like them and neither do cats/dogs ;-)
So for my card I stamped the image onto 140lbs watercolor paper from Schut with Simon Says Stamp intense black ink. Colored him in with Talens ecoline, a fluid watercolor.
My panels are always slightly narrower because I cut them from a bigger sheet. So I mount the panel with foamtape and fill the gap on the cardbase with a similar colored washi tape.
For more information on the Cat lover's blog hop, see this