No struggle, froze. Crouch beside pup and attract its attention with crumpled up paper ball. When the pup shows interest and is watching, toss the object 1 to 2 meters in front of pup. Degree of willingness to work with a human. High correlation between ability to retrieve and successful guide dogs, obedience dogs, field trial dogs.
Chases object, picks up object and runs away.
Chases object, stands over object, does not return. Chases object and returns with object to testor. Chases object and returns without object to testor. Starts to chase object, loses interest. Does not chase object.