I don't understand where you are getting this information on torn ACLs. Ligaments do not repair themselves. In humans they will do surgery to repair the ligament, but in a canine it is much more humane and makes more sense to in a way that will replace the ligament itself. TPLO screws two metal plates into each side of the knee and makes it so the ligament is not even needed. The less invasive surgery is really only an option for older dogs. It is pretty much tying a wire around the joints to hold them together and it will hold for a few years. any and all homeopathic methods for this type of injury only will reduce pain but I'm not about to put my 1 year old doh through a decade of pain until the day he dies.