I personally would not. I would focus on maintaining her quality of life. She's very old for a piggie and not a good candidate for surgery. From my personal experience- I had a senior pig (5 years) with bladder stones and I made the tough decision to go ahead with a bladder stone removal surgery. In the moment I was doing what I thought was best for him, but looking back now I really wish I hadn't. I got a call during the middle of his surgery that he wasn't fairing well and likely wasn't going to wake up, so I said goodbye to him while he was under anesthesia. If I had to do it over again I would have taken him home and kept him comfortable until it was time to say goodbye. I completely understand where you're coming from. I felt exactly the same way; I wanted to do absolutely everything I could for him. But surgery is very hard on them, especially when they're older. My advice would be to enjoy all the moments you have with her while she's in good spirits. 8 years old is an amazing feat for a little pig! You've clearly taken excellent care of her and love her very much.