Need Advice

My beautiful almost 9 year old Doberman is facing a right hind leg amputation. I am an emotional wreck and sit here with her wondering how in the world she would be without her hind leg. I don’t feel it possible for her to even potty. I know I will get answers back saying they learn how to but at what struggle. Four years ago my girl had a TTA for a torn CCL. She has done very well with the repair. However, this past January she developed a limp. My daughter encouraged me to get it looked at. I took her for x rays and was faced with them thinking it was Cancer. We have done bone biopsy, FNA of enlarged lymph nodes, multiple abdominal ultra sound and most tests came back inconclusive or contradictory. The oncologists from the beginning said it is cancer but it was not presenting as they expecting so we did not rule out the very small possibility that we may be dealing with a deep bone infection from her previous surgery. We did furher testing, staining, fungal testing, more ultrasounds 30 days later. All negative with no changes to ultrasound. After 5 weeks of antibiotics with no change we agreed to see a radiation

oncologist to possibly radiate the leg. They did ultrasound for radiation measurements and conferred with the orthopedic surgeon to get clearance on the metal plate in her knee. Results? Bone in her leg is so diseased that the metal plate is barely holding on. They do not recommend radiation as they are fearful the bone will break leaving us with the decision to amputate now or in an emergency painful situation. I am heartbroken. I feel like I can not see her like this but I also can not continue to see her in pain or all drugged up. Bloodwork is normal. Chest x rays are clear. Histiocyctic Carcinoma is what it has come back as and it is supposed to be a very agressive cancer. We are very lucky that in the 4 months since this started we have not seen changes, but I feel we are pushing our luck and need to make a decision. Please can someone tell me how a doberman would do without her hind leg?