hey there;
my dad's mom and my wife's mom both are plagued with this, and there are 4 things that i know really help, though they have tried many prescriptions, diets, etc, these 4 rein supreme so far:
1. paul harvey's remedy, which is to soak white raisins in cheap gin for ~3 days, then eat 3 raisins per day. no joke.
3. drink milk daily ---this one is a golden rule.
4. the equine version of Absorbine topical liquid ---this is a product for horses, and they make a watered-down version for humans, but u might as well water it down yourself and save some dough...works very well, but is only temporary, ie, it iwll not rebuild your joint's cushion, but merely reduce its swelling. very, very, effective at that! for our horses/us, we wrap an ace bandage around the joint, then pour the Absorbine on it, soaking it.
good luck, and keep hunting...