When I got my troubled border collie Orson, we started learning to herd at a sheep farm in Pennsylvania.

NPR: Excerpt: 'Dog Days'

We start in the English countryside, on a sheep farm, owned and operated by Sir Ranulph Fiennes.

CNN: Quest for exploration

When I bought the farm in upstate New York, I imported some of the sheep we'd been herding with.

NPR: Excerpt: 'Dog Days'