What a fascinating breed! By the breeding mix, he sounds as if he is quite a large lad.
....."Once called a "Catahoula Cur", the foundation of the Louisiana Catahoula Leopard Dog came from the Red Wolf, which was in Louisiana in the 1500's, the Mastiff and Greyhound which were brought by DeSoto in 1541, and the Bas Rouge (Beauceron) brought by the French in the early 1700's. Together these four canines contributed in part to the inception of the Catahoula that we know today."
........"A Catahoula requires a minimum of one hour of running exercise each day, rain or shine. If the dog is kept outdoors, this is not a problem, but, if he is an indoor dog, he must get this exercise. Daily walks or runs in a yard are sufficient, but necessary. Since this dog has the inherent nature to herd and track game, he needs the exercise to release some of that penned up energy."
http://www.centralpets.com/animals/mammals/dogs/dog3091.html