Also, since you are unsure if it’s a food intolerance at this time I would start keeping a list of ingredients now of any foods (including treats) fed in the past or you are currently feeding. Comparing what ingredients these foods have in common and how your dog responded to each food is something that needs to be done in order to find the offending ingredient(s). It can be a long process or it may be simple, diligence is the key if it is a food intolerance.
If food intolerance turns out to be his problem it is important to treat your dog as the individual he is and find his specific intolerance; each dog is different and each will be intolerant to different things.
