My three are all on the Royal Canin Yorkshire. They've had no problems with itching, or anything else for that matter.
In fact my oldest was always getting doses of the trots with everything I tried before this, none since she went on it. One of my others has grown a much better coat since starting on it. He always had a really thin coat that broke easily, but it's getting quite long now & really silky.
I have far more problems finding food for my bigger Skyes that doesn't make them either itch or have the runs
