Why Choose COSEQUINreg; Cosequin contain FCHG49 Glucosamine Hydrochloride, TRH122 Sodium Chondroitin Sulfate, and MSM (Methylsulfonylmethane). This combination of ingredients helps to protect your dog's joints and support healthy cartilage matrix. Each soft chew also contains omega3 fatty acids to help support skin and coat health. Joint Support with Skin Coat Support #1 Veterinarian recommended retail joint health supplement brand. Specially formulated and designed for dogs over 10 lbs. Cosequin brand joint health supplement is shown to be safe, effective, and bioavailable in peerreviewed, published, controlled U.S. veterinary studies.