Canine Matrix Organic Mushroom Supplement for Dogs Contains 1 - 100 Grams Canine Matrix Organic Mushroom Supplement For Dogs And Pets. For A Healthy, Shiny Coat. Improved Circulation To Skin And Coat. Biotin And Methionine Help Add Luster & Shine To Dull Coats And Reduce Shedding. Natural Histamine Blocking For Allergy Relief And Less Scratching. Reishi Mushroom Balances An Over-Active Immune System.