Jerilyn, I remember watching the dogs in their long runs at the "puppy farm" Bill and Cathy Lambert had. I was visiting MoMo Meany Pants. At any rate, what you describe sounds a lot like the activity of Greyhounds in those runs. The runs were long rectangular, fenced areas that were side by side. Each run housed 3 Greyhound pups/adolescents. The dogs spent a lot of time running back and forth along the fence line, barking at each other--talking smack. They got strong and practiced running in groups, lots of direction changes. It was clearly a fun activity, though if it was happening in my back yard, I'd try to quiet it down as well.