8 in 1 Excel Brewer's Yeast And Omega Fatty Acids And Garlic Will Give Your Dog A Healthy Coat. Taken daily Brewer's Yeast reduces shedding and improves skin. High in protien, vitamins and minerals. Fortified with Zinc and Biotin. Some people give thier dog Brewer's Yeast to repel fleas and to reduce urine damage done to lawns.