Who Let the Dogs In?

My household includes some bipeds and a four-legged Wheaton Terrier named Molly. That shaggy canine shared the room with me some nights when I was reading Mark Derr's "How the Dog Became the Dog," an intriguing but very dense analysis of her distant ancestry. A few times, as is usual in our Los Angeles neighborhood, the coyotes that nest about a half-mile away were yipping and howling into the darkness while I read.