Genetics play a very important part in the coat of an adult Yorkie.
Make sure you are dealing with a reputable breeder who carefully breeds to produce puppies who look like the breed standard. The market is full of Yorkie puppies from backyard breeders and puppy mills who grow up to be pretty far from what a Yorkie is supposed to look like.
What registry does this breeder use? If it's anything but AKC, there is no guarantee the puppies are even purebred. If they are AKC, that is only a starting point. |