If your puppy has a really good silky coat you'll be able to grow it out. But most yorkies have a combination coat for growing coat can be sadly is almost impossible. Growing the topknot is pretty much a matter of not trimming around the eyes, putting it up and using a small barrette or clip to keep the rest from their eyes. IMO you should find a good groomer now to establish a routine. In the least the ears need to be tipped, hairs plucked and most people like a sanitary and butt trimming.
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