While purebred dogs are held to specific breed standards by organizations like the American Kennel Club and the United Kennel Club, hybrid dogs are not quite as well - organized. (thesprucepets.com)
At about the same time, the English Kennel Club was established, the breeding of dogs became more regulated, and specific breed standards appeared. (cavaliercanada.com)
The key difference between a Mutt - i - gree ® and a purebred dog is that with purebreds, their parents and other ancestors are all members of the same breed, and generally conform to a specific breed standard. (animalleague.org)