Watch as service dog Harley has a blast during his playtime! This heeler loves to chase and play with balls, bringing joy and happiness wherever he goes. Follow along for a fun and heartwarming video of one happy pup! anxiety service dog diabetic response dog dog dog training fake service dog guide dog how to train your service dog Inu medical alert and response medical alert service dog mobility service dog service animal service dog service dog task service dog task training service dog tasks for adhd Service dogs service dogs in action オーストラリアン・キャトル・ドッグ