Miko also has gastritis...His actually lead to him vomiting blood once which was incredibly scary. Definitely no dog food...that stuff is terrible for them...I'm convinced that his gastritis came about because of the prescription food he was on for so long before we started homecooking. While he was on dog food, he ALWAYS burped/belched after meals and had gassy issues...
Carafate helps coat the stomach and really helps with that. Here are some links that are excellent resources of info...
Merck Veterinary Manual Merck Veterinary Manual
Really high quality probiotics are extremely important, IMO, in these cases....
I use VSL#3 now (b/c of his liver disease and GI issues), but Udo's makes a good one as well..I believe it's the children's blend.