I have a 10 year old pug and since the weather got cold he could barely get himself up from a laying position, I mix black strap mollases, coconut oil, peanut butter and he licks it off my finger. He can now get up by himself and does not walk stiff legged anymore. I also give him 1 low dose asprin a day for the pain and have added esther c to it also, I am amazed at how well he is doing now.
If you have a juicer, juice cruciferous family veggies like broccoli, kale, cabbage, and mix that with canned cat food. You can add fish oil and nettle powder and even safflower blossoms (health food store) turmeric and garlic oil as these all inhibit the inflammation. Pigs feet broth is also helpful for it's chondroitins which nourish joint cartiledge. Fixed my dog's arthritis in 2-3 weeks.