Vitapet R-A Joint Formula Double Strength Vitapet R-A Joint Formula Double Strength contains 25% omega 3 to help maintain pain-free, supple & mobile joints in dogs. In addition to omega 3, Vitapet R-A Formula Double Strength also contains the important antioxidant vitamin E to: Help maintain a healthy heart & circulation. Help maintain pain-free, supple joints. Improve coat condition. Support the immune system. Promote strong bones & teeth. Vitapet R-A Formula Double Strength is ideal for senior & mature dogs & larger breeds that are prone to joint problems. Directions To be mixed into food. Medium Breeds 15-25kg: 5-7ml per day. Large Breeds 25-35kg: 7-10ml per day. Very Large Breeds over 35kg: 10-15ml per day.