Breeders have managed to mix during the merle gene at the same time creating the Isabella merle French Bulldog, but these puppies are extremely uncommon. As a result of how dominant the merle gene is, merle Frenchies must only be bred to the dog by using a sound coat color. https://devinhwfmu.ampedpages.com/5-simple-statements-about-lilac-merle-french-bulldog-for-sale-explained-66759912