[alaskayorkie]

I like FL Tink's suggestion of having people in various rooms call him. It makes it fun.

At obedience school, they had us put them in a sit and then walk away just a few steps. Distance wasn't important. Time was. After 30 seconds in a sit (at first), we gave them an animated "COME" and reward.

We built up the time and distance gradually to 4 minutes in a sit. Sometimes we'd return to the dog. Other times we'd call them to us.

If you can't get any distance away before they break, stand on their leash and position yourself a step away. Eventually, they'll get it and you can increase your distance.

Another thing we did was put them on a long lead (30 feet) and do the same thing. If they tried to wander, we could steer them toward us.