NEW YORK (AP) — When the Westminster Kennel Club dog show added an agility competition a decade ago, it opened U.S. dogdom's most elite door to mixed breeds for the first time since the late 1800s.

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. NEW YORK (AP) — When the Westminster Kennel ...