Oh I'm so sorry! I feel like an insensitive dolt - I'd forgotten Reba was mostly lab. I would definitely talk to your vet about other options.
I have some other suggestions you may want to look into though
You may wish to discuss with your vet whether having artificial joint fluid injected would be beneficial. It's not viable with Angel, as her knee issue isn't femur against tibia, it's patella against everything. I don't know the physiology of a dog's elbow, so maybe joint fluid would be helpful there?
Also, cortisone injections are safe, and they WORK. They're also fairly reasonable I believe - they inject cortisone into the affected joint, and usually there's a couple of rough days, and then relief. It's a temporary fix, and I don't know that it actually heals anything or even prevents deterioration, but it does reduce the inflammation and the pain.
Acupuncture is also supposed to be good for stuff like that - many people swear by it.
Hope that helps