Description Cosequin DS Maximum Strength Plus MSM and Boswellia comes in a 60 ct tasty soft chew and contains FCHG49® Glucosamine Hydrochloride†, TRH122® Sodium Chondroitin Sulfate†, Boswellia, and MSM (Methylsulfonylmethane).This combination of ingredients helps to protect your dog’s joints while supporting healthy joint function and mobility.