“the ability to train dogs is an art that depends on a trainer’s ability to play and a dog’s ability to play in turn…where there is no play, there is no relationship or meaning.” Play facilitates “portals of affection and trust” and “humane dog training is playing with a purpose” and as “Heine Hediger (1955/1968) said, ‘Good training is disciplined play’ Lindsay (2001).

Taken from my essay, “What is a behavior problem”  http://www.responsibledog.net/behavior_problem.html