Hi...I also have a 14 wk old puppy who I'd love to achieve a full coat on...
You will get much input here...Many of our fellow YT members have Yorkies with Beautiful coats....
I've been using Chris Christensens Prouduts...
http://www.chrissystems.com/
These are wonderful...I use the day-to -day shampoo's and conditioner...and also the ice on ice finishing spray to reduce tangles....
Another good brand is Pet Silk...I also like this company and they will write you back and tell you what is best to use if you tell them about your dogs coat type.
http://www.petsilkonline.com/catalog/index.html
I just love the detangling shampoo and conditioner...the detangling spray..and the Liquid Silk....really helps make Sophies coat silky and smooth...
Some members love Plush Puppy..
I have only bought the blow dry cream...its good if there is any mat...and I put a dab on that and it comes right out.
http://www.plushpuppy.net/index.html
Just know that Plush Puppy take a good time to come...for some reason they are super slow...
***Hope this helped...**** Enjoy your puppy...