The Kai is a very intelligent breed. They are easily trained, easily house broke and are extremely clean dogs. They are not overly aggressive towards other dogs, though SOCIALIZATION is an absolute MUST with the Kai, just as it it with any breed. The Kai is reserved with strangers, but soon after a new acquaintance is properly introduced the Kai is quick to welcome that person into the home.The Kai is a medium sized breed, measuring from 18 ? to 22 inches for males, and 17 ? to 20 inches, for females. Weight ranges from 25 to 55 pounds.