nevernever bark

"Explains why Ancient Mai made those Temple Dog statues to assist the Wardens in maintaining security, I suppose." I got out a short-handled duster made of a rowan wand and a bundle of owl feathers, and began to carefully clean the dust from the model city. "What about the barking thing?"
"Their bark has some kind of spiritual power," Bob said. "A lot of stories say that they can make themselves be heard from fifty or sixty miles away. It isn't just a physical thing, either. It carries over into the Nevernever, and can be heard clearly by noncorporeal entities. It startles them, drives most of them away - and if any of them stick around, Mouse could take his teeth to them, even though they're spirits. I figure that this alarm-clock bark he did was a part of that protective power, alerting others to danger."
I grunted. "Superdog."


White Night Chapter 14, Page 135-136