see if you can find some DL-phenylalanine. This amino acid is a precursor for dopamine production, the body's own pain killer. Recommended dose is 1,000mg 3 to 4 times daily at least 30 minutes before meals. It will take about 2 weeks to kick in though.
If you can find either Indian pipe or Lady's slipper these can help as well. They are not easy to find though. Indian pipe is the strongest herbal pain killer you will find. Lady's slipper is a natural narcotic. So the sedative properties will help her sleep through some of the pain.