Thank you everyone. She is such a wonderful companion and we just don't want her in pain. The shot does seem to have helped, although it did seem to alter her mood. Kathy, I already went online and I did find information, nothing awful, but nothing too helpful either. It did say not to do the shots very often as it breaks down the cartiledge. As you pointed out Joanna, she can only meow, and she's always done so much of that anyway, that it can be difficult to know if she's in pain now or only wants attention or to be brushed, etc. Our vet did say the University of MN can do surgery, Pat, but we just feel it may even worse to do that to her. The cost isn't a factor, but cats are noctural and to try to keep her calm and down may prove very difficult and she almost vapor locks going to the vet. She had to stay overnight a couple of years ago and they literally had to cover her completely up so she didn't have to see anything around her.
I am just so sorry that she is going through this, but I am going to continue to think good thoughts and maybe she will hang in there!

Trish