In Monticello, FL, down a quiet road lined with pine trees and pastures, Tealbrook Kennels is the life’s work of 86-year-old Barbara Genthner — a devoted breeder, trainer, and Labrador enthusiast.

Labrador retrievers are friendly, loyal, and always ready to play. No wonder they’re considered to be the most suitable pets worldwide. Labrador retrievers, commonly called Labradors or Labs, are ...