Foundational Thinking For Creating Good Behavior In Dogs Part 2 : Choose Your Methods of Training Carefully, Especially with Reactive/Fearful Dogs. By Christine Mallar, Co-owner, Green Dog Pet Supply. Christine has 30 years of positive reinforcement training experience with dogs, cats and captive exotic animals. There is still a big disconnect in the world of training – there are two camps: some trainers that use positive reinforcement training (“Causing desire of a thing, situation or behavior by using a pleasant or motivating stimulus”), and some that use aversives (“Causing avoidance