Is there anything that can help to clear tear stains up really quick. I have a 5 month old puppy that will be in his first conformation show in a few weeks and would really like to find something that will at least fade the stains a little by then. Does any of the mixes like the Milk of Magnesia, corn starch and peroxide or the Corn Flour, water and a drop of bleach work? I have also read that tomato juice might help but I wonder if it would help quick enough? Also he is on TOTW pacific stream dog food.