Hi Marina. So glad your Frenchy is doing better! If you’re not already doing it, try digestive enzymes. I use Mercola’s and this has been a huge help for my 2-year old Pom with similar issues. All the things you’ve done have made all the difference for us too: lower protein and fat, limited ingredients, no poultry (for us turkey and egg specifically), and I give healthy snacks every 4 hours and before bed. Your Natural Balance diet – is that all dry? Kibble is the most difficult for dogs to digest. Can you substitute some of that with some good canned (without carrageenan) or raw? Keeping the fat low of course. We feed half dehydrated raw and half low-fat kibble and that works great. And lastly, any plans to wean your boy off the Prilosec? (I know alot of vets and owners swear by the acid reducers and PPIs but there are others that say not enough stomach acid can cause the sphincters to malfunction. Pepcid seemed to make my dog worse after a few days, although it helped my older dogs with other issues.) Best of luck and please keep us posted!
