Natures Best Pet Liquid Glucosamine Chondroitin MSM for Dogs - 100% Natural - Delicious Organic Beef Flavor - DOGS LOVE IT! - MADE IN THE USA. Specially formulated for Small to Med size Dogs up to 20lbs Natures Best Pet Hip & Joint Care only uses Opti-MSM The most superior form of MSM on the market today. Contains Greengrown Glucosamine: USP grade glucosamine derived from non-animal sources, helps to maintain synovial fluid that lubricates the joints. Proudly Made in the USA with Superior Natural ingredients. Contains Opti-MSM the only U.S. manufactured MSM available. Other forms of MSM mostly comes from China. Natures Best Pet Premium Pet Products is a Family owned business dedicated to delivering only the best natural pet products to our customers