Boy there just are so many opposite opinions on this out there that I really don't know what the right thing is to do. I read where elevated bowls can contribute to bloat and that scared me off. I can't remember where I read it but it had a lasting impression. Who the heck knows for sure?
Honestly, no one knows what does or doesn't contribute. I've had danes that met all of the "risk factors" and they didn't bloat. I've had well over 30 danes in and out of my home from my own as well as foster dogs and have lost *one* dane to bloat. I've had high stress danes, underweight danes, very deep chested danes, danes that have gorged on trash or other junk, danes with digestive problems, fearful danes, etc.....The one that bloated was a very high strung, easily stressed fear biter. She bloated and died within 3 days of coming into my home.
I do believe truly that genetics play a large role in bloat, however, my first two danes came from a line that ended up producing several "bloaters" and my two danes never bloated, although siblings and half siblings of theirs did. But from doing my own bit of research, I have found that I was very lucky in that case, as direct siblings of danes who have bloated have a very high chance of bloating themselves.
I also believe environment plays a huge role in the risk as well. Stressful, noisy homes with a lot of yelling or constant activity can cause anxiety, which I believe to be a major component - many rescue danes / family pets who are boarded at kennels experience bloat episodes while being boarded.
This also leads into the personality of the individual dog - a fearful, anxious dog is more likely, IME, to be at risk for bloat.
I believe that dietarily, there is SOMETHING there that can increase the risk, although I'm not positive what, nor is anyone conducting the research on bloat. It is interesting to note that raw-fed dogs rarely bloat from what I have read and raw feeders I have spoken with. My theory is that grains play a role. Years ago, soy and beef pulp were believed to be a large factor, though that has never been proven.
I believe in the long run, the best way to prevent bloat that is within OUR control is to use common sense. Don't let your dog gulp food or water. Keep them quiet before and after meals for at LEAST 1 hour. Let them eat in peace - a quiet area of the house where they can eat without being disturbed.
Feed as high a quality of food as you possibly can.
Have them gastropexied. These suggestions aren't a sure fire guarentee against bloat, but if it can help minimize the risk, then it's worth something, right?