Pet foods contain inexpensive, difficult to absorb minerals. Mineral disturbances can result in deposition of calcium in abnormal locations, such as around joints. Lack of vitamin C results in the weakening of soft tissues such as the such as the collagen found in ligaments that support joints. Without proper ligament and muscle support, joints become unstable and inflamed. I believe that many cases of arthritis are a result of immune system dysfunction.
Conventional medicine uses drugs to block inflammation and pain in the joints.
However, there is little done to rebuild cartilage, thicken joint fluid or remove bony deposits. Many anti-inflammatory drugs damage joints, resulting in further degeneration. Here are a few suggestions. A natural home prepared diet contained whole grains, raw meat, raw vegetables, bone meal and digestive enzymes is the best place to start. The nutrients provided by this type of diet are vastly superior to any commercial product.