Staci, I'm so sorry I only saw your thread right now, but happy to read that sweet Keegan's problem is not as serious as you feared.
The green beans and carrots diet, mixed with dry food, worked very well for Carina; she lost 12 lbs. Also, and you can check this with the vet, I give Carina organic Flaxseed oil to lubricate her joints.
I do hope that with weight loss and all the medications available, Keegan will be without pain for a long time.
Many hugs and belly rubs to her.