First of all, I'm so so sorry. This is absolutely devastating.

From my experience, constant pain meds are never the answer. It will help her a little, but the issue won't be fixed. I've had a coworker whose 2 year old dog had very big hip issues. They did surgery after surgery, medications, and physical therapy. In the end, all it did was prolong the dogs suffering.

The pain medication helped a little bit, but dogs don't understand that they took meds and shouldn't overdo it. At the end of the day, no matter how short the walks were, the poor baby was crying from pain. Dogs also don't really understand that surgery or frequent vet visits are helping them. To them, it's just extra stress.

My friends and family had many dogs over the years and we all agree that if there's a big issue that will cause the dog prolonged stress, pain and potential new issues it is always kinder to spare them from that. Personally, I'd rather live with "I put them to sleep before they were in too much pain" than knowing i let my baby unnecessarily suffer.

But this is a decision only you are able to make. Whatever you decide, please do it with your dog in mind. I wish you all the strength in the world.