U.S. Customs and Border Protection has welcomed the birth of the first foal in the agency's mission to use horses to patrol the rugged terrain in its Big Bend, Texas, sector.

The U.S. Border Patrol’s Big Bend Sector marks a historic milestone with the birth of a new horse, the first horse ever born into a horse patrol detachment. The foal, named Dolly, is the first horse born into Border Patrol’s 100-year history,

Welcome Dolly, the first foal ever born into a horse patrol detachment in the 100-year history of the Border Patrol. The U.S Border Patrol’s Big Bend Sector is marking a historic milestone with the birth of its new horse.

Dolly the filly was born March 9 to her mother Juanita at the Sierra Blanca Border Patrol Station, southeast of El Paso, U.S. Customs and Border Protection spokesperson Landon Hut