Jen, I would also consider Mr. Meow's age. (Sorry, I don't remember what that is.) When RB Ruffles got so ill in June, I had the option of surgery to figure out what was going on. (We suspect cancer, but nothing was ever felt and nothing showed up in her ultrasound.) At 16, I decided I would not put her through it, just keep her comfortable. Would I have opted for surgery for a 2 year old? You bet. What is my cut off? I pray I never have to figure that one out!