Breeding the Color (Pattern) of Merle in XL Bullies and XXL Pitbulls Post comments:0 Comments Merle is a powerful coat-color gene (M) that dilutes black pigment into stunning patches of silver, slate, blue, and sometimes tan. It’s dominant, meaning one copy of the gene (Mm) produces the merle pattern. Continue ReadingBreeding the Color (Pattern) of Merle in XL Bullies and XXL Pitbulls
