Robert Crumb got tired of Fritz and killed him off.  The Ralph Bakshi movie was the most successful independent cartoon like, ever, and Crumb got 10% of the 90 mil+ the movie raked in.  Listen, anyone who wants a character for their next project, give me 10% off the top and you can do whatever you wish to my rabbit.  Whatever . Vaughn Bode warned Bakshi that working with Robert Crumb was going to be a nightmare.  If you know anything about Bode that was a warning that should have been taken very seriously.  But hey, so what?  90 large in 1972.