I don't hear it, but Amy 'buzzes' me when she's not happy. I've never felt Tommy do it. Lily only did it once after the vet gave her an injection. I think it's quite cute!
Gizzy buzzes when she is in pain - when the vet gave her a shot last week it was just like having a mobile phone in my hand. It`s a good job i didn`t try to answer it though, that could have been embarrassing