So sorry for your loss. As another Dobie owner, I feel your loss to heart. Sadly, Bloat is one of those things that has a way of sneaking up on a dog. I guess, in a way, it loosely relates to us with appendicitis in that shrouded kind of way. Unknown, stealthy health issues are always !@#$ing scary.
BTW, I had some neighbors years ago who had their German Shepherd/Timberwolf mix (that's right, no joke.... thing was HUGE) diagnosed with bloat. The corrective surgery destroyed the poor dog. He actually only lived for about 1 year after the surgery due to a countless number of post operative issues. Mostly, he simply did not want to eat, ever again. It was like, once they cut him open and messed with his digestive system, he refused to use them again. Very sad really, but dogs have that strange intuition where they do NOT like to be fixed by unnatural means.