Originally Posted by Cassidy's Mom
Mental exercise can often be as tiring as physical activity, so exercise her brain with training.
I think that this is the best thing you could possibly do.
spend more time doing command training.
create an obstacle course around the backyard and walk the dog through it (in random paths).
Blanketback's suggestion of a flirt pole is a good idea too.
It sounds like your dog needs to feel like it has a job to do. Mental stimulation will calm a dog down in 10 to 15 minutes.