On my facebook site, I have posts of tattoos that people have done of their chinchilla's footprints. They have come up with some creative ways to get the footprints on paper. The best one yet, was to use watered down food coloring. They took a large piece of paper and "painted" a large swath of coloring on the middle and then allowed their chins to run around on it and track the prints all over the paper. The food coloring is safe, it is what most people use to color wood anyway. Then, after each chin, she circled and labeled the prints for each one. The end product was a large paper with many different prints all over it, but she had successfully labeled each chin's individual prints by doing them each separately. It was a neat affect overall! Chin-Art!