Catahoulas come from the swamps and woods of Louisiana, where they were developed to find and hold feral hogs and to gather semi-wild cattle. Working ability mattered more than looks, so size and build vary. The famous merle "leopard" coat, often with glass-blue or mismatched eyes, shares the breed with brindle and solid-colored dogs.
Most are intelligent, independent and loyal, with a protective streak and real stamina. They tend to bond tightly with family and stay wary of strangers, and some are picky with other dogs or small animals. Daily vigorous exercise, firm but kind training and early socialization help a great deal. Many shelter dogs labeled Catahoula are mixes, so each dog's own personality matters more than the label.