I have grieved more over dogs lost than people lost.
You made a tough choice. The cliche is "when the dog can't do the things he/she loved doing" it's time to go, but even when it's obvious to outsiders, the insiders have a very tough decision. I think you made the right one, and my best to you and your family.
Thanks again for all the kind words, people.
It means a lot to me.