Aw Deb, sorry about Sanford.
Give him a gentle hug for me, okay? I think you did the right thing, having the surgery. I feel that when you know them as well as you know him, you can tell when they're ready to *go*. He'll let you know when he's had enough. They're tough, and they're willing to fight through a whole lot to keep on being with you, their best buddy.
They can sense when they are just not going to make it. I know you are going to know when that time comes and it has not come yet.
Here's to his speedy recovery and many years of health.
Now you rest up. That's so stressful.
Feel better soon.