Lut - scary as this is for you, I'm very relieved that you have decided to have Snoopy spayed. I had a cat with early medical problems and her first vet advised against spaying. Since Thisbe and I were very closely bonded from our first moments together, I carried that decision no matter what other vets said to the contrary. It was only when she was about 6 years old and a vet told me about mammary cancer that I decided to risk having her spayed. She was fine, but because I had waited years to have the surgery done she did get cancer when she was 14. If I'd take the risk earlier, I'm sure she would have lived many more years. Snoopy is a special case, so she will get lots of extra special care and I feel sure will come through it all perfectly well.