Gosh I am crying now I've read this. It is such a hard thing to do isn't it. I have had to do it and even though I knew it was right it's still so painful. But it IS part of the responsibilty of being a pet owner, you wouldn't want them to suffer unnecessarily, so I think you are doing exactly the right thing here and letting him have a much more enjoyable time albeit shorter than the one filled with medication and vet stress, and that's only if he survived the trauma of the op anyway.

He looks absolutely gorgeous, have a big snuggle with him from me! X