3) Biddability: You want a dog that will check back, work cover, and come when called. Each puppy is different, but after looking at the litter's sire and dam work, have the breeder call them in. Do they respond well to the whistle, hand signals and verbal commands? Take a look at the pups again. When you whistle, move your hands and talk, do they look up, or ignore you? The ones that focus on you with keen snapping eyes are the pups that might prove most biddable.