"Her overall quality of life is better"
I've been giving my dog, Sophie, Rose-Hip in her food for the past three or so years.
At first we did it as an anticipatory response to hip displaysia, but we've noticed that her overall quality of life is better when giving it to her. She's undergone three surgeries on her knees and joints, and it has helped with her recover and keep inflammation down. Also, she's 10 years old and still runs and plays like a puppy; surely it's helping with arthritis as well.