Hi i'm new and was just having a browse as i lost 2 dogs to bloat, i read through the thread and found peoples opinions interesting but i was a bit suprised how people take 'research' as gospel.
The original purdue study some years ago was based on data collection as is the new purdue report which was supposed to be out last month, its not exactly based on scientific research more a gathering of peoples experiences. (People were invited to fill out a questionaire)
Experienced breeders, old time breeders, long time owners etc all handed down that raised feeding was best and for many years that advice has been followed so it goes without saying that a high percentage of people raised fed their dogs versus a small minority that didn't. Armed with that then the amount of raised fed dogs who have suffered with bloat is obviously going to be considerably higher than the non raised feeders i would even go so far in saying its in the region of a 70/30 ratio.
Now with forums, chat rooms, breed specific pages etc people are talking and coming to the conclusion that raised feeding is a possible culprit and maybe it is but maybe it isn't at the end of the day there has been no specific research into bloat.
It will be interesting to see the new purdue report but i am pretty certain it will be the outcome that raised fed dogs are more at risk.
For the interested both my dogs were fed off the floor one was a raw feeder, the raw feeder was in season which i suspected contributed as she never had an easy time and was due to be spayed. The other had been out in the car and sometimes got over excited she bloated during that night and we were too late to save her and she was pts, neither were from the same lines but both were narrow in chest and both had prominent sternums, both were excessive panters when nervous I personally suspect its more genetical than we think with a bit of stress thrown in.
I honestly would like to see extensive research into bloat in certain breeds than say Hip dysplasia as HD although a debilitating condition isn't a killer.

Anyway thats my take on it