Complex sentence: Al Walker of Animal Research Foundation has stated that Catahoula bulldogs are 50% Catahoula Leopard Dog and 50% American Bulldog in the first generation cross, while in succeeding generations, it may be 75% -25% mix in either direction.
Split into simpler sentences: Al Walker of Animal Research Foundation has stated that the Catahoula Bulldog is recognized as 50% Catahoula Leopard and 50% American Bulldog in the first generation cross. In succeeding generations, it may be 75% -25% mix in either direction.