The mouth of Shiba Inu is black when it is young, and it will slowly fade as they grow up. Some Shiba Inu will lose it quickly, and some will not fade until they are one year old. This phenomenon is called the black mask phenomenon. Shiba Inu puppies of any color often have a black mask phenomenon when they are born, but it can fade quickly. Occasionally, some dogs wear a black mask throughout their puppyhood. If they become adults, If the dog still has the black mask phenomenon, then this is a defect of the adult dog.
Shiba Inu has a black mouth and a white mouth. Each one has its own merits, it all depends on personal preference. People with white lips have relatively lighter pigment, and their coat color will generally not be very red in adulthood. As they grow older, their coat color will become lighter and lighter, and their entire face may become completely white. The pigment of the little black beak is relatively darker, and the coat color is relatively better when it grows up. It takes a certain amount of time for the little black beak to fade. It depends on the melatonin ability of each dog. Some may fade in about 6 months. Some may take about 1 year.
For dog lovers, whether the Shiba Inu has a black mouth or not, in fact they are Just as cute, if the mouth of an adult Shiba Inu has not faded, the owner should not force it.