This morning I took my three dogs, Ranger, Trooper and Linus to the park. This is a necessity since I have two Collies and a Sheltie and live in Chicago. Until someone moves in with a flock of sheep to keep them busy, it is my responsibility to provide them with a heavy dose of physical and mental stimulation.

In my daily dog training life I am constantly asked a simple question: How much exercise does my dog need? The answer depends on your dog.