Take part to our Great Debate: do you think it is time for the merle gene to be eradicated?
The Innate Health Assessment (IHA) tool advises that merle dogs should not be bred from, reigniting debate about the future of the merle gene itself.
Merle is a genetic coat pattern caused producing mottled colouring, lighter patches, and sometimes blue or odd-coloured eyes. While visually striking, it is also associated with serious welfare risks- particularly when two merle dogs are bred together. Dogs inheriting two copies of the merle allele, often referred to as “double merles”, have a significantly increased likelihood of deafness, vision impairment and other sensory deficits caused by suppressed pigment cells in the eyes and inner ear.
Supporters of the IHA’s position argue that continuing to breed from merle dogs carries avoidable risks and that prioritising appearance over health is no longer acceptable. They point to the tool’s strong backing from major veterinary and welfare organisations, and its wider aim of reducing suffering linked to inherited traits. From this perspective, phasing out the merle gene is a necessary step towards improving canine welfare in the long term.
Others, however, urge caution. They argue that merle itself is not inherently harmful when responsibly managed, and that problems arise primarily from poor breeding practices rather than the gene’s existence. Critics worry that calls for eradication oversimplify complex genetics, risk shrinking gene pools, and unfairly stigmatise certain breeds and responsible breeders who already avoid risky pairings.
So what do you think – time for the merle gene to be eradicated?
Tell us what you think here, or write to editorial@dogstodaymagazine.co.uk with “Great Debate” in the subject line.
