Can a double merle be healthy? Double merles, despite their deficiencies, are generally quite healthy dogs capable of living long, otherwise normal lives. And they are no more aggressive, unpredictable or untrainable than hearing and sighted dogs.
What happens if you breed 2 merle Aussies? Many people are unaware, but when two merles (of any breed) are bred together, each puppy has a 25% chance of being born as a double merle. These puppies have excessive white coloration – lack of pigment – and this coloration causes loss of hearing, vision, or any combination of the two impairments.
How do I know if my dog is double merle? Dogs with the double merle gene may be/have:
All white in color, or have patches of merle/mottled coloring on the top half of their body – their head, back, and base of the tail. Light-colored paw pads. Have light blue, green or brown eyes, perhaps even eyes that are different colors.
Is Double merle lethal? This has led breeders to kill white puppies at birth, leading to the other name of double-merle pups, “lethal whites.” The genetic defect itself isn’t lethal, and the ONLY genetic defects these dogs have are the hearing or vision impairments — which do NOT get worse over time by the way.