It is one of the few supplements that have the proper balance of Omega 3, 6 and 9s. Hempseed Oil, the primary ingredient in Ultra Oil for Pets, is often called ?Nature?s most perfectly balanced oil.? The 3:1 ratio of Omega-6 to Omega-3 Essential Fatty Acids creates optimum conditions for your dogs health, growth and vitality. Hempseed Oil is also rich in three other unsaturated fatty acids important to nutrition – gamma linolenic acid, stearidonic acid and oleic acid. Finally, hempseed protein contains all 20 known amino acids, including the nine essential amino acids needed for a balance diet in dogs and cats. This combination of nutrients helps make Ultra Oil for Pets the ideal complete pet nutritional supplement. No fishy smell!