I hate these steroid threads. "Is (famous bodybuilder) on steroids?" Who cares? Everybody knows that steroids are prevalent in both amateur and professional sports. They are also prevalent in mainstream society. The truth is that anybody can get big when on gear. I hear all of this "it still takes hard work" stuff, which is true if you want to be an elite bodybuilder, but you can be on gear and grow bigger and stronger with sub-par training and diet than you can naturally when you do everything right. If you want to get big and that is your only goal, then what are you waiting for?
There are natural agents called DMOAs or disease-modifying osteoarthritis agents that help dogs with osteoarthritis by improve the function of bone cartilage or fluid (synovial fluid, a fluid that lubricates the joints). These products include glucosamine (a substance the is naturally found in a dogs body) and Chondroitin sulfate (CS). Studies are inconsistent, with some showing improvement in relieving some arthritis symptoms in humans. Both are found in dog foods that promote joint health, although there are no studies that support their use at levels in food. There are also other ingredients that have some support for use.