I think I saw Sophie on a b video website and I was so glad that someone else's B made that noise I showed it to my husband and daughter. Thanks for posting that video because as a new B owner we thought we had some kind of devel dog!!! She does it the most to our oldest dog Josie. There are nights she even does it from under our covers in bed when she hears Josie moving out in the living room. Too Funny!!!!