Nutramax Cosequin Maximum Strength (DS) Plus MSM. This joint support supplement is formulated for adult dogs and contains glucosamine, chondroitin sulfate, and MSM. These tasty chewable tablets are easy to administer and can even be disguised in your furry friend’s favorite food. Best of all, Nutramax is a number one veterinarian-recommended brand, so you can feel confident giving this joint supplement to your pal.