Yes, the hair just grows. The change starts on the head then the back. My Cowboy is now 9 months old. When I pull his hair up in a knot, only the ponytail is black (his black puppy head color
). His back has the blue/silver look now with black hanging at the lower end (his black puppy color). You will see your pup go through many changes. Someone once said "A Yorkie is like a box of chocolates....you never know what you are going to get"