I was just researching a rather prolific weed that I have growing in the yard, it's called Teasel, and it turns out it is good for musculoskeletal (I'm sure that's a word - when will the auto dictionaries catch up) pain and for treating lime disease. It is used to treat people with chronic arthritis as well (I'll heading out today to dig up the roots to make tinctures).
Now the question is can I treat a dog with it? I also think adding a bit more fat to her diet would help. I was told by a neighbor who has an akbash that their dog was all stiff and seemed to be aging fast, her coat was all dull and patchy. So they added a "dollop" of rendered lard to her diet every day, and she is really healthy now. Lush coat, no stiffness, looks good to me anyway.
Frankly I think all of us could use a few more "dollop's" of fat in our diets

Just sayin.