Your vet sounds too scary..Horses do get colic, which can be the same as bloat in dogs, including the twisting of the intestine or sometimes rotation of stomach. That is why a lot of vets tack the stomach when they desex female dogs in large breeds......Any large breed with a big chest is at risk, but it has been known to happen in little dogs.
I am happy to send you some PDF's on it, but you would have to pm me your e-mail...it won't show on here, unless you are better at it LOL and can do it. I have a huge computer library of PDF files on all sort of dog related stuff, especially for giants/newfies and behaviour. Because I have done several different courses on dog related stuff
I do have a bloat chart, which i think comes from the great Dane world, but is kept on the fridge of a lot of newfie people I know world-wide. us newfie people have a great forum that is very sharing in a lot of giant issues. I have been on there since 2003........And yes I do have a life off the computer
See what this PDF converted to a Jpeg bloat chart looks like I am happy to email this as a pdf plus the other info to anyone interested........Anxiety is actually one of the main causes. So far i have been blessed and not had any full blown bloat incident, but i also know some acupressure points that can help in early bloat...i have a link to that.......... http://bluefrontiers.us/bloat_accupress.html
bloat chart jpeg saved.jpg