Liquid joint supplement especially for man. Dogs, like horses, develop many problems with in their hips, back and legs. These problems are usually associated with arthritis as they age, breed specific genetic disorders, or joints that are just plain over used. Cox veterinary laboratory took the same scientific research used to formulate acti flex for horses and adapted it to dogs by adding. Each ml contains 180 mg glucosamine sulfate, 150 mg chondroitin sulfate, 50 mg MSM, 50 mg perna canaliculus, 35 mg ester C 30 mg hyaluronic acid, 2 mg boswellia serrate and yucca.