detects danger

"Well, they're not entirely mortal," Bob said. "They're the scions of a celestial being called a Foo Dog and a mortal canine. They're very intelligent, very loyal, tough, and can seriously kick ass if they need to do it. But mostly, they're sentinels. They keep an eye out for dark spirits or dark energy, guard the people or places they're supposed to guard, and alert others to the presence of danger."


White Night Chapter 14, Page 135