My groomer has recommended that I get Snickers Royal Canin for Yorkies. She thought his coat seemed dry and thin. Do you that feed Royal Canin use the food "special" for Yorkies? Right now Snickers is on Eukanuba for small breed puppies. He eats it fine but he also eats everything else - poop, dirt, "helicopters" from the trees, bugs, sticks, anything outside he can get in his mouth!
I don't mind spending more money on the food if it really does make a difference.