They must be talking about Royal Canin Yorkshire Small Bites. We used it for a time but it has corn in it and my dogs itched like crazy and their coat didn't change at all. Other people have used it and has had great success. Who knows...maybe Texas yorkies are grown differently? LOLOL!
Anyway, here's it is at PetCo...
http://www.petco.com/shop/product.as...anin+yorkshire