Dr. Robin Ganzert, president and CEO of American Humane, the country’s first national humane organization, said the nonprofit celebrates Petco’s decision and hopes people will seek out information about positive reinforcement training, which focuses on rewarding desired actions rather than punishing unwanted behavior.

“Positive reinforcement training is a kinder and more thoughtful approach to training, leading to the development of behaviors that are more deeply ingrained in the mind of the dog,” she told TODAY in an email. “Some will argue that shock collars are effective, as you can scare an animal into changing its behavior to avoid being shocked, however, this fear-based approach does nothing to promote the bond between you and your pet, and really only teaches the animal to be afraid of you. Punishment-based training can have deeply negative effects depending on a dog’s personality. Some animals will become fearful and shut down, losing their confidence. Other animals may become aggressive or learn to avoid you.”

Celebrity dog trainer Victoria Stilwell, who starred in Animal Planet’s “It’s Me or the Dog,” has been promoting positive training methods for 20 years as the editor-in-chief of Positively.com and founder of the Victoria Stilwell Academy for Dog Training & Behavior. She said positive training is more than just giving dogs treats; rather, it’s a philosophy of teaching dogs without the use of pain, fear or intimidation.

“We do say ‘no’; we do instill boundaries, but we put the emphasis on teaching a dog what to do in a certain situation or environment,” she told TODAY. “What we’ve found is that dogs that are trained like that — and this is really important — are more emotionally balanced.”

Stilwell expects Petco will experience blowback over the decision to stop selling shock collars but hopes the public will embrace teaching pets what to do instead of suppressing their behavior.

“I want my dog to make the right choice,” she said. “I will teach him how to make the right choice, and that’s positive training.”