"Fat Freddy's Cat Omnibus" - Gilbert Shelton
Fat Freddy's Cat is a fictional orange tomcat nominally belonging to Fat Freddy Freekowtski, one of the Fabulous Furry Freak Brothers, a drug obsessed hippy trio featured in Gilbert Shelton's underground comix.
The Cat is much smarter than Freddy, and while sharing many of his preoccupations such as drugs, food, sleep and sex, his stories also feature a fair amount of defecation. Like Garfield (whom he predates) he is laid back, but in his personal habits and outlook he is more like the Freak Brothers. However he tends to regard the Freak Brothers with amused contempt, frequently expressed by defecating in inappropriate and inconvenient places, such as stereo headphones or Freddy's pillow.