Spotlight on Spike
Spike is a main character in the Peanuts comic strip by Charles M. Schulz. He is Snoopy’s brother who lives alone in the California desert. He first appeared in the strip from August 13, 1975 and has appeared in Peanuts more frequently than any other of Snoopy’s siblings. (wiki)
When he was introduced to the strip, it was revealed that Spike’s exceptionally low weight was because he had been living with coyotes, and his job was to clean out their den, which apparently causes him to burn off a lot of body fat. Although he got a better-fed appearance after his first visit to the Brown household, he apparently had to go “back to business” soon after returning home, for he soon became as thin as before.