I didn't mean to make it sound as though I'm minimizing your hesitation to put Luna under. That's certainly not the case. Whatever you decide, just be sure to trust your instincts. You know your cat better than anyone. When Yodie had to go under for the ear polyp, I was so scared because she was so thin that you could see all her bones, even in her face. And Dr. Lee said it scared him to death. But she came through it fine. Please know that extra prayers are going out to your sweet Luna and to you, whatever your decision.