Oh no, I'm so sorry to hear about Raustyk. You will both be in my prayers! Hugs being sent to you both!

Maybe you could consider Chinese herbal pain medicine (is there a local alternative vet?) in light of her kidney function? At the clinic where I work we use a formulation called Body Sore (Chinese Name: Shen Tong Zhu Yu). We get it from Shen Xie, DVM PhD of the Chi Institute in Florida. Here is how he describes the Body Sore: Half of the ingredients are to resolve Qi-blood stagnation and relieve pain, and another half ingredients are to tonify Kidney and strengthen the bones and ligament/tendons.

Just another pain management idea. I have tried using it for my dog's pain, but he has a very sensitive stomach and the herbs depress his appetite too much. However, it works wonders for some dogs.