I have a 16 1/2 year old cat. I've had her since she was 2 months old, so we have history. About 6-7 years ago, she ate dental floss out of the trash can and almost died. I had to pay $2000 for emergency surgery where they pulled apart her intestines and reattached them. I paid it because I felt it was partly my fault since the floss was in the small bathroom trash can that has no lid. About 4 years ago, she got really sick. She was down to 3lbs and wouldn't eat. It turns out she developed hyperthyroidism and couldn't maintain her weight. She wasn't expected to live a month. I had to force feed her with a syringe several times per day, and I had to administer her IV fluids in her neck twice per day. It took a lot of work, but I got her better, and she has lived four more years. The vet calls her a miracle cat. That all cost me another $2000. Last year, I had to pay $1500 because she had abscesses in her teeth, and the infected ones had to be removed. She has been great and playful until about 10 days ago. I took her to the vet on Thursday, and it cost me $400 to find out she has some liver issues. She's back down to 5lbs, and she's refusing to eat and keeps throwing up her medicine. The vet wants another $500 for X-rays to determine if she has cancer or some other issue, and this additional $500 won't cover any treatment she may need. I feel like it's time to let her go. I don't want her to die, and I feel horrible typing that, but I can't justify spending another $1000 on this cat to force her to live. My mother won't leave me alone. She thinks I should spend the extra $500 to at least find out if I can save her, and then do whatever is necessary to keep her alive. What would you do?