Picture this: You’re working the edge of a hay field turned brown, cut months before in late summer. A lanky young German shorthaired pointer plunges in and out of the thick brush bordering the field, working the cross wind. Without a moment’s pause, he dives again and again into the tangled mass of thorny raspberries, dried goldenrod, and buckthorn, quartering briefly out into the field for a gulp of chaff-free air between plunges. An older shorthair works the brush farther in from the edge, tracking bird scent along the single moist strip of ground bordering a rise of ledge.