I was interested to see this post. I have currently 2 B. gals, Tootsie and Peanut. Tootsie by day is a yodeling lunatic, but sleeps like a rock. Peanut, on the other hand is mostly silent, except for an occasional growl when needed, and has been that way for the 4 years we've had her. About 3 or 4 times in the past year, though, we will wake up to the most mournful, creepy howl I've ever heard.. Pea 'sleep howling' I guess you'd call it! It truly sounds a bit "other worldly" and it always makes me hope she isn't having a really bad doggie dream!