Jessi went up the stairs and paused to stroke the purring cat.
Kittens can be heard purring as early as one week old.
It is unclear where purring sounds come from since the sound cannot be replicated in a deceased animal.
One theory about cat purring sounds is that mother cats purr so that their blind and deaf kittens can find them to nurse.
Often the purring is accompanied by gentle or vigorous kneading, usually in correlation to how content they really feel.