Within the realm of designer doodles, the Merle gene weaves a mesmerizing array of coat colors and eye hues in our cherished canine companions. This gene, responsible for beautiful dappled coats and captivating eyes, also harbors complexities. Breeds like the Australian Shepherd, Collies, and Dachshunds carry this gene proudly, yet it can bring potential ocular issues.

The Merle gene can subtly manifest as a stunning blue iris, but its presence can pose risks of ocular anomalies, leading to potential blindness. Understanding genetics is key—dogs can carry one or two copies of the gene, impacting coat color and eye variation. Breeding two Merle dogs increases the chances of severe ocular complications, emphasizing responsible breeding practices.

This gene's complexities manifest in conditions like microphthalmia and iris abnormalities, potentially leading to blindness. Responsible breeders avoid mating affected animals and seek guidance from veterinary ophthalmologists to identify and eliminate these genetic conditions from breeding lines.

Early detection, often possible as early as six weeks old, underscores the need for vigilance in breeding programs and responsible pet ownership. Balancing aesthetics with understanding and responsible practices ensures both beauty and well-being in our designer doodle companions.