There were times when we were involved in teaching our dog all kinds of tricks, bringing the ball - a good exercise. the daughter sits on the couch, in the hand a clicker, in the box - delicious.. as a snack - carrot cut, from which the dogs are just pulled.. the daughter throws the ball, the dogs are not in a hurry to run, tracks where the ball went, goes to get.. returns with a sad moustache: did not get, the daughter goes to look for the ball, dogs like going with her.. when the daughter returns with the ball, then sees how the dogs quietly rubs the carrots out of the box.. well, who and who trains?