Many small dogs live their entire life with luxating patella and it never results in arthritis or pain, nor does it interfere with the dog’s life. A luxating patella occurs when the knee cap moves out of its natural position. The patella in dogs is shaped like an almond and its purpose is to assist in knee extension. The patella resides in the tendon of the quadriceps muscle group which attaches to the bone below the femur and the tibia. When this muscle group contracts, it pulls on the tendon and the knee cap and if the patella is pulled out of the natural groove it is considered to be a luxating patella. The causes of this condition can be congenital, genetic and/or traumatic injury. A supplement that helps to support ligaments and mobility may ward off this condition or help dogs deal with the pain and discomfort of the joint movement during exercise. Breeds with a predisposition for luxating patella are Miniature and Toy Poodles, Maltese, Jack Russell Terriers, Yorkshire Terriers, Pomeranians, Pekingese, Chihuahuas, Cavalier King Charles Spaniels, Papillons and Boston Terriers.