Cosequin DS Plus MSM Pro Line for Dogs, 60 Soft Chews The #1 veterinarian recommended retail joint health supplement brand formulated to support and maintain the health of your pet's joints and cartilage. Supports mobility for a healthy lifestyle in a tasty, easy-to administer soft chew. Contains Glucosamine, Chondroitin, plus MSM and Boswellia to help support joint health and mobility. Tasty soft chews your pet will love!