The CKC is a smaller registry compared to the American Kennel Club (AKC), but they do have their own set of standards for each breed.
If you're looking for a registry that accepts mixed breed dogs, you might consider:
* The American Canine Association (ACA): They register both purebred and mixed breed dogs.
* The Dog Registry of America, Inc. (DRA): They also register both purebred and mixed breed dogs.
* The United Kennel Club (UKC): While primarily known for purebred registration, they also have a program called "Canine Partners" for mixed breed dogs.
Keep in mind that registration with any of these organizations doesn't change a dog's status as a mixed breed. It simply means they are registered with a specific registry.