Arthogen Plus for Dogs - resembling the original Arthogen, has a powerful blend of glucosamine HCl and chondroitin sulfate. Both have shown the ability to relieve pain, restore parital movement to affected joints, provides structure by holding water and nutrients, while giving cartilage elasticity. Arthogen Plus has the addition of two very popular ingredients, MSM and HA. MSM (methylsulfonylmethane), which strengthens collagen in the joints and may also help with osteoarthritis and rheumatoid arthritis. HA (hyaluronic acid), is one of the best ingredients that lubricates and absorbs shock while stimulating the growth of cartilage. HA also assists in stopping pain and inflammation while hydrating the synovial cell membrane. Arthogen Plus is great for senior dogs and large breeds while offered in a convenient beef and cheese chewable tablet that your dog will absolutely love!