I saw this collage technique on scrapbook.com's gallery late last year. Pretty cool, eh? You cut one inch squares and arrange them, butting up against each other. You can also throw in a 1" x 2" piece here and there. I glued mine to illustration board with a scrapbook paper border.
I made two others of my dearly departed pets. This one is an ode to Jim Morrison of The Doors fame. Sigh. Ever wonder-- when my generation becomes nursing home residents, will they allow Jim Morrison posters on the walls and Led Zeppelin piped into the lounge? Just one of the things I worry about.