Hills and Purina are bad food Rx or not!! It makes me so angery that vets still tell people to feed there dogs bad food!!!
There are alot of other people on here that can tell you what food worked for there dogs.
Also check any food you chose for Citric Acid, if it has citric acid do not put water in it as it can cause bloat, which might be causing your dogs symptoms. citric acid is fine other wise.