Programs typically last a month or two and can help resolve issues such as aggression, leash pulling, separation anxiety, and chewing on shoes and furniture. Trainers work daily with your dog, similar to how coaches work with professional athletes, says Erick Innis, who served as a Navy SEAL K9 trainer and owns Coastline K9 in Naples, Florida. “A lot of people don’t realize how detailed and scientific dog training is,” he says.