Merle Breeding Legislation and Kennel Club Policies Worldwide

For decades, I watched the dog breeding community attempt to regulate itself on the question of merle. Breed clubs issued guidelines. Experienced breeders shared knowledge freely. Mentoring programmes tried to educate newcomers. And yet, year after year, double merle puppies continued to be born in numbers that demonstrated the limits of voluntary compliance. Governments and kennel clubs around the world have increasingly concluded that stronger measures are necessary.

The regulatory landscape for merle breeding is now a patchwork of national laws, kennel club registration rules, and breed-specific policies that vary enormously depending on where you live and which breed you work with. Understanding this landscape is essential for any breeder operating internationally or selling puppies across borders - and increasingly, it matters even for breeders who work entirely within one country.

The United Kingdom

The Kennel Club (KC) has taken one of the most proactive stances on merle regulation in the world. Since 2013, the KC has refused to register puppies in any colour that is not listed as standard or recognised for a breed. For breeds where merle is not historically established, this effectively blocks merle registration entirely.

More significantly, the KC introduced a requirement that breeders producing merle litters in certain breeds must provide DNA evidence that the mating was not merle-to-merle. This policy directly addresses the cryptic merle problem, recognising that visual assessment is inadequate for determining merle status.

The UK also benefits from the Animal Welfare Act 2006, which makes it an offence to cause unnecessary suffering to an animal. While this has not been specifically tested in court regarding double merle breeding, legal scholars have argued that deliberately producing puppies with predictable severe disabilities could constitute an offence under this legislation. The precedent, if established, would have enormous implications for breeders throughout the United Kingdom.

Continental Europe

Germany

Germany has perhaps the most stringent regulatory framework for colour breeding. The Animal Welfare Act (Tierschutzgesetz) includes provisions against breeding for characteristics known to cause suffering. The Qualzucht (torture breeding) provisions have been interpreted to encompass merle-to-merle matings, and some German states have actively enforced these rules. The Verband fur das Deutsche Hundewesen (VDH), Germany's kennel club, works in conjunction with these laws to restrict merle breeding in non-traditional breeds.

The Netherlands

Dutch animal welfare law includes explicit provisions against breeding animals with heritable defects when the outcome is predictable. The Raad van Beheer (Dutch Kennel Club) has implemented strict colour registration policies and, in some breeds, requires genetic testing before merle litters can be registered. The Netherlands was among the first countries to treat irresponsible colour breeding as a welfare issue rather than merely a registration concern.

Scandinavia

The Nordic countries - Sweden, Norway, Denmark, and Finland - have long traditions of strict animal welfare legislation. The Swedish Kennel Club's breeding policy explicitly addresses colour-related health risks. Norwegian law prohibits breeding that causes suffering to offspring, and Norwegian kennel club regulations require health testing documentation before registration. These approaches reflect a cultural emphasis on animal welfare that has made Scandinavia a model for merle breeding regulation.

North America

United States

The American Kennel Club (AKC) regulates merle primarily through breed standards rather than blanket policy. Each parent club determines whether merle is an accepted colour for its breed. The AKC does not require genetic testing for registration, which some advocates view as a significant gap in welfare protection. However, individual breed clubs have introduced their own testing requirements and breeding recommendations that go beyond AKC minimums.

State-level animal cruelty laws theoretically apply to deliberate production of disabled animals, but prosecution for double merle breeding has been exceedingly rare. The patchwork of state regulations means protection varies enormously depending on jurisdiction. As documented in our analysis of the merle crisis in non-traditional breeds, this regulatory gap has allowed merle to proliferate in breeds where it raises significant welfare concerns.

Canada

The Canadian Kennel Club (CKC) follows a similar breed-standard-based approach to the AKC. Provincial animal welfare legislation varies, with some provinces having more robust frameworks than others. The CKC has, however, been more proactive than the AKC in issuing guidance on colour-related breeding risks.

Australia and New Zealand

The Australian National Kennel Council (ANKC) and Dogs New Zealand have both addressed merle through breed standard enforcement and, increasingly, through mandatory health testing requirements. Australia's state-based animal welfare legislation provides additional legal framework, and some states have begun specifically addressing breeding practices that produce predictable welfare outcomes.

The FCI Framework

The Federation Cynologique Internationale (FCI), which coordinates kennel clubs across much of the world, establishes breed standards that member clubs must follow. The FCI's position on merle is embedded in individual breed standards, and their International Breeding Regulations include provisions requiring breeders to avoid producing offspring with hereditary defects. The genetic complexities of white and dilute phenotypes in shepherd breeds illustrate why international coordination on colour-related policies remains challenging.

What Regulation Cannot Do

Legislation and kennel club rules are necessary but not sufficient. No law can compel a breeder to care about their dogs. No registration rule can reach the unregistered breeding that produces a substantial proportion of merle puppies sold through online marketplaces and social media.

The most effective regulation works alongside education. When breeders understand the ethical framework for merle breeding, they comply not because they must but because they recognise the moral imperative. When puppy buyers understand what to ask and what to demand, they create market pressure that reinforces regulatory requirements.

This is why I have spent decades not just advocating for better rules but providing the educational resources that make those rules comprehensible. The science is clear. The testing tools exist. The regulatory frameworks are expanding. What remains is for every individual breeder to decide whether they will be part of the solution or part of the problem that makes ever-stricter regulation necessary.

Practical Steps for Compliance

Regardless of your jurisdiction, the following practices will ensure you meet or exceed any current or foreseeable regulatory requirement:

1. Test every breeding animal for merle status through a reputable laboratory
2. Maintain comprehensive records of all test results and breeding decisions
3. Never breed two merle carriers together, regardless of allele type
4. Register all litters through your national kennel club
5. Provide full genetic documentation to every puppy buyer
6. Stay informed about changes in legislation and registration rules in your jurisdiction

The breeders who will thrive in this evolving regulatory environment are those who have always done the right thing. For the rest, the window of tolerance is closing. The dogs deserve better, the public demands better, and the law is increasingly requiring better.