Blaster,
Sincere condelences for you and your family's loss. Limb said it well, try as best you can to take some comfort in the good life that you and your family provided to Trooper for so many years. He already showed you his gratitude everyday he was by your side.
The emotions you have shared with us via words only demonstrate the effort and love you put forth into your relationship with Trooper. I dread when I have to experience that day myself.