I've read articles stating that cats purr at some frequency which promotes healing their tendons and joints. I wonder if that's true because my cats never purr just for purring but only when they feel good. According to some sources cats will purr when they are injured and in pain as well as when they are content. Any proof for that?
http://www.scientificamerican.com/ar...y-do-cats-purrVeterinarians have long noted that broken bones heal quickly in cats. The vibrations associated with the feline purring is of interest to the holistic healing community. The measurable Hertz of a cat's purr lies between 25 and 150. 20 to 50 HZ have shown great promise in speeding bone injuries in human medicine. Research is currently being done to find out if purring actually accelerates the natural healing process of broken bones in humans.