It is what we call a puppy recall. It is not a controlled recall. We use it early on to have the puppy come to us, for example, while on a walk.

Choose a consistent sound or a whistle and link it with food. You will make the sound and follow with the food for a few repetitions. Then on a walk when the puppy trots away from you, make the sound the instance he looks at you show him the food and feed.