Purring could mean a cat is in terrible pain such as during childbirth. Kittens will purr to their mother to let her know they are getting enough milk while nursing. Purring is a process of inhaling and exhaling, usually performed while the mouth is closed. The catnip plant contains an oil called hepetalactone which does for cats what marijuana does to some people. A cat's jaws cannot move sideways.
Cats have over one hundred vocal sounds, while dogs only have about ten.
A cat can jump even seven times as high as it is tall. A cat is pregnant for about 58-65 days. If left to her own devices, a female cat may have three to seven kittens every four months. This is why population control using neutering and spaying is so important. Visitors are encouraged to add their own suggestions.