They say there are 2 kinds of cats - tree cats and bush cats. Pipi and Spike were bush cats. They liked lounging under the bush and shrubs The highest they would go was on our fence. Stan, the cool cat, is a tree cat. He loves his trees, and he has his favorite one by the park where he can see humans that he likes (or tolerates) and maybe his pet mice are kept under the this tree as well.