My hobbes has the loudest purr but he also snores lie the dickens...LOL...Worse than any man I've known...I have to shake him several times a night...mind you I'm a light sleeper but this is ridiculous..LOL. On the flip side my Cavin is a soft purrer but the other night I put my head down on the pillow...big one mind you ....and I could feel his purr from the far corner of the Cal king mattress. Rose my head to see if he was really there and heard nothing. He has an internal purr I guess. LOL.