THIS ITEM MAY ONLY BE SHIPPED VIA GROUND OPTIMA 365 contains an essential 10:1 ratio of Omega 6 and Omega 3 fatty acids in a veterinary-exclusive formula that includes serine, proline, taurine, antioxidants, vitamins and minerals. It has been determined that omega fatty acids need to be consumed in an optimum ratio for ideal health benefits. Too much of one, not enough of another, will end up in less than optimum health. Most anti-shedding products are high in fat, but OPTIMA 365 contains 33 percent fewer calories than competitive brands, which is significant considering the significant numbers of obese dogs and cats.