Dr. Ian Dunbar is a veterinarian and dog trainer residing in Berkeley, CA. He is also the founder of the Association of Pet Dog Trainers, and is renowned for his Sirius Puppy Training program, which he describes in his popular books and instructional videos.
If I’m going on a walk with dogs (my dogs or anyone else’s!) I pretty much always bring a bait bag and treats along—though I am also prone to putting freeze-dried treats in my coat, vest, and/or pants pockets, and have lost more than a few pockets and garments that way.