Thanks for the input.

The thing that caught my eye was hyperalgesia.  Of course, it can't be perfectly smooth sailing through the process, so, now I have something else to be concerned about.

Okay.  Thanks.

I think it prudent that I give the whole story, in case anyone sees anything critical.

Periodically, Clover would stand with her right hind leg trembling, and I thought it was because she just wasn't putting all her weight on it - just her unique way of standing.  Along the way, she would sometimes yipe when petted, so she was put on Rimadyl, thinking it was arthritis.  Eventually, last year, she started limping, so I took her in.  The vet examined her, and said he found a growth between her foot and toe pads, and said we'll watch to see if it grows.  As she was running out of Rim, I was concerned that she'd have both the arthritis and foot pain to deal with, so I asked the vet if we could speed up the diagnostic process.  He said to bring her in, and they'd do surgery, if necessary.  Then he later said it was a stone, not a growth, so they removed it, but, they had also taken a full-body x-ray, and that's how they found the shadow, which they figured was cancer.

She is currently on Rim, Gabapentin,  and Tramadol, yet still limps or hops, and yipes occasionally when touched.

Well, we've been to the vet, and are now going to proceed with diagnostics, then go from there.  Thanks, everyone, for your input.  Wish us luck!

Thank thank you you.

I will.

Yet another thank you.