When mine eat from bowls, I use a raised bowl for my tripawd dog as it’s easier for her to balance with her head up, but the others have theirs on the floor.
There have been a couple of studies into bloat (GDV) which you may find useful https://www.veterinaryevidence.org/index.php/ve/article/view/57/126 And this is also quite informative on causes of bloat. The studies may not have allowed for all of the possible causes https://www.vetinfo.com/elevated-dog-feeder.html
