"Nothing is more maddening to most people than a dog that ignores them and only comes when she feels like it. In many cases, a frustrated owner will reprimand a dog after she does return. Dogs live in a world of cause and effect, so that pet has no clue why she is being yelled at. Now you have taught her that there is a negative association with coming to your call."
- Cesar Millan, from Cesar's Rules: Your Way to Train a Well-Behaved Dog
Jeff Dentler, CPDT-KA, CTDI