I agree with BCnut – that it’s a food issue. My dog had the same thing, and when tests came up normal my vet said maybe it’s seasonal allergies. They recommended Pepcid and it helped a little but I stopped it because of the harm it can cause. They never once suggested a food intolerance. I investigated that myself thanks to reading the posts here. My personal theory is that a food that the dog is sensitive to causes inflammation in the digestive tract, causing the irritation from stomach acid, etc., particularly on an empty stomach. When you eliminate the foods causing the inflammation, which I was finally able to do, stomach acid doesn’t bother them (whatever the season).
