An Embarrassment of Bitches

Plot:

Dog trainer Francisco Pilar is murdered after naming Best of Show at a dog show. Castle gets the Labrador he was training temporarily adopted as team mascot, and his nose proves quite useful. Airhead reality TV star Kay Cappuccio, seen leaving Pilar's room, has a motive, but was he or she spied on by the camera planted in the dog's collar. And why is there a customs undercover agent?