Whatever you decide to feed him, add water to the meals, don’t free feed.
I would go along with the prescription food for a few months, at least until the dog is stable. Don’t bother testing ph every day, it takes a few weeks for a change to show up, that’s what the vet told me. Instead, I would have it checked at the vet’s office every 2 or 3 months.
Have you checked the search engine? /forums/search/bladder+stones/
BTW: There is nothing wrong with prescription food http://skeptvet.com/Blog/?s=prescription+food
