I had an English Cocker as a kid and without any training at all I killed more birds than the guy in the neighborhood did with his fancy pointer. This was with me nor my parents providing any training because we did not no how, we just took him hunting.

We would walk threw the fields or woods and he would stay close while working cover and when that little tail started twitching and a couple of little yelps came then it was time to get your gun ready. Now we did not know if it was going to be flying (birds) or running (rabbits) but it was going to be game. After the shot he would retrieve the game and bring it back, again with no training just nature instinct and desire to please.