I have been using my cocker as a bushing dog for my lurcher, not had the cocker long but its been good fun!
Getting local running that was not really possible before I got the cocker, when you see them getting a bit harder on and exited just get ready with the whistle, they dont like being stopped when the other dog is running but they need to get used to it as it happens at shoots aswel they cant retrieve every bird they want to.