Many people adopt puppies without understanding the amount of hard work and commitment canine training requires. According to the American Society for the Prevention of Cruelty to Animals (ASPCA), almost half of all shelter intakes are the result of owners relinquishing their pets. Many times, these dogs are abandoned because their owners are unable to control problem behaviors. Effective dog training techniques can help owners address negative behavioral issues. Dog trainers work with owners and pets to resolve problem behaviors, keeping dogs in homes rather than shelters.