A native dog does not have to have a black tongue. Tongue color is not the only criterion for determining a native dog’s breed or characteristics. A dog's tongue can come in many variations, including pink, red, black, or other colors. Tongue color is often related to a dog's genetic heritage, but not all native dogs will have black tongues.

A native dog is a general name for native dog breeds. Their appearance and characteristics can vary greatly. Big differences, depending on the specific breed and individual. Different native dog breeds may have unique characteristics, including coat color, body size, ear shape, etc., but tongue color is not a necessary characteristic.

When choosing a native dog or evaluating the quality of a dog, it is more important to pay attention to the dog's health, temperament and compatibility with people. Regardless of tongue color, a healthy, friendly, and docile dog is more important.