I used to pick up with a guy who worked six cockers at once. A real joy to watch. Waiting for the end of a drive, his dogs, all patiently sitting alongside him, would all stand on their hind legs like Meerkats, tracking a wounded partridge screeching past overhead. I was new to training and working cockers at the time and asked what training he did with his dogs in the close season. He replied, heelwork, heelwork and more heelwork. He offered one more snippet of advice - if you’re running a cocker try & ensure both you and the dog are working in the same county