Bulls are judged with a "dummy" weight for four seconds to see how hard they will jump and twist to buck a rider. Bulls that do well can sell for up to $50,000. Laura Ziegler/KCUR hide caption

itoggle caption Laura Ziegler/KCUR

Ginger, an English bulldog, comes to work each day with Will Pisnieski. She's one of several dogs who are regular fixtures at dog-friendly Authentic Entertainment in Burbank, Calif. Grant Hindsley/AP hide caption

itoggle caption Grant Hindsley/AP

The U.S. Border Patrol uses wild mustangs rounded up from the Rockies as it takes its hunt for smugglers into the most rugged terrain on the Arizona-Mexico border. Joshua Lott/Reuters/Landov hide caption

itoggle caption Joshua Lott/Reuters/Landov