RC is not a high quality premium food. It has corn gluten meal which entices the dog to eat. It also causes severe allergic reactions to some Yorkies (many here on YT can back it up). Please read the ingredients & don't purchase the ones w/wheat, corn, soy, animal by-products & BHA/BHT.
You can ask for fre samples here:
http://www.yorkieetalk.com/forums/yo...e-samples.html