Cluster, Cassie: - Cassie Cluster grew up having many different critters, but always had a special affection for cats. She raised rats for pet shops, endangered turtles for release into the wild, has kept birds, fish, snakes, dogs, rodents, a Dutch bunny, Guinea pigs, small reptiles and amphibians, and even a pet tarantula named Beatrice. Still, none compared to her feline family, and her ability to analyze their various personalities. Cassie shares her practical experiences of toilet training cats over the past 30 years.