Merle dog breeds have distinctive coat patterns due to the presence of the “Merle” gene. Merle coats result from a mutated gene that produces less melanin in some parts of a dog’s skin and fur.

If a dog with blue irises is high on your list of must-haves, there are a wide range of breeds that promise to be the apple ...

Other merle breeds include Australian Shepherds, Border Collies, Catahoula Leopard Dogs, and Dachshunds. The merle gene is a ...