The itching is from a systemic yeast problem in your dog - it is from eating food that are not grain free and have wheat in them - believe me! our family dog cost us over thousand dollars and was given prednisone and all types of allergy pills which did not work, it was his diet, milkbones are the worst! we immediately purchased a kit from Nyzmes.com, it is a website dedicated to the health of animals, it worked on our shelty, he was so covered in sores and smelled so bad from the constant itching, within months he had his hair grow back again, he got worst before he got better as the yeast and toxin was being removed from his body, if you are canadian there are canadian distributors on the website, you will not have to therefore pay duty - TRUST ME, this is the only thing that will help your animal, also on the website they recommend certain types of foods! good luck to you all, your pet will love you for doing this! it is not expensive either!