Merle comes from catahoula bulldog and leopard dogs .. which are decendents of the game dogs a milinea ago.. them ol boys crossed the game dog into everything from the time of Dixie til now. Its not allowed because the merle came from crossing the game dog into the pariahs of the indians, injun,s natives take your pick they had some good hunters and the good ol boys just picked up on that. There are several hounds that are crossed with old game dogs as well . So you have alot of confusion because a bulldog to this guy is a bandog to that guy and a pit terrier to the man across the street.
does infact come in any color and or pattern except merle.. everyone is shooting you straight, and English Staff does not allow solid white dogs and AKC AMSTAFF does not allow dogs with red noses;theAmStaff dogs have to have the dark skin around the eye. The American Bulldogs are primarily all white however they are coming in black and primarily brindle these days and merle from a Alapaha Blue Blood Bulldog cross over back in the early foundation.
APBTs with merle with always kick back some catahoula trait out of the blue and taint the whole bloodline or strain. If someone is breeding merle dogs hopefully they are at least good catch dogs which require no set conformation the dog just has to be able to work. JMO they should round up all merle APBTs and put them with the Catahoula Bulldogs and leave it at that; would be nothing but compliments sense so many game lines have crossed into the merle dogs to promote sales. In all practicality thats what merle APBTs are really "Catahoula Bulldogs"