Just wanted to share... (short version)
A dog that gulps her food. She is fed canned, from one of those "stop gulping" kind of bowls. She also drinks a lot of water, after meals. She eat's grass quite often. Spits up water quite often. I believe she has done all the above for all (or most of) her life. She's been to the vet.
Braggs Organic Vinegar with mother... stopped the spitting up completely.