PowerPoint Show by Andrew

David Thompson carries the reins of a horse's headstall while preparing to gather cattle near Ignacio, Colorado, on June 10, 2014.

Dave walks with his dog, Fang, to catch horses that he will use for a day of gathering cattle.

He puts a horseshoe on a horse's hoof as he prepares for a week of gathering cattle.

Cowboys are pictured on their horses after eating lunch.

Dave works to help a horse regain its footing after it fell inside a trailer on the way to gather cattle.

He inspects a cut on the horse's ear after it fell inside the trailer.

He looks back through the trees as he rides his horse.

A horse bucks as it tries to run from a saddle that had become loose during preparations to gather cattle.

Dave looks down on a large herd of cattle during a week of gathering cattle on June 12, 2014.

Cattle cool down and drink water at a man-made reservoir in the mountains.

Dave sits with his other dog, Amelia, as she cools down after a day of gathering cattle.

Dave removes burrs from his dog Fang that had become stuck to her fur while helping to gather cattle.

Rancher Steve Pargin and Dave (R) talk with the rest of the crew during a cattle drive.

Cowboys Wyatt Williams and Dave restrain a calf as Stetson Mackey prepares to give it medicine.

Rancher Laura Pargin holds a warning flag in an attempt to slow traffic as cowboys push a herd of cattle across Highway 160.

Dave works to move a large group of cattle up a trail.

Cowboys push a herd of cattle down Highway 160.

Resting under a pine tree after having lunch.

A cow inspects Dave as he rests on the ground.