The American Kennel Club registered white Cairn only till 1917 but not after that. Cairn terrier grouped under the Skye terrier along with the Scottish terrier, and West Highland White terrier finally alienated from the two. All three of them gained the status of a separate breed. Since then, white Cairns has been registered as the West Highland terrier as per AKC norms. The other kennel clubs like Federation Cynologique Internationale (FCI) and United Kennel Club (UKC) don’t regard a white Cairn as a purebred dog. It could be likely that white Cairns is an outcome of mixing the Cairns with other white breeds, and dogs of such coloration aren’t recognized or allowed to the show ring.