So we adopted a 9yr old EB a few months ago. We had to do a hard switch to our current dog food since he was a rescue. We gave him time to acclimate to our current high quality Chicken and brown rice food however he still has diarrhea. He has been to the vet so we know he is healthy. Do you think I should try Lamb and Brown rice or go straight to Grain free? I'm not sure if just changing the protein helps or if it's the rice that's the problem. We had a boxer that we had to put on grain free and he was not happy with it. He started to tear up our trash after the switch, so It makes me nervous to put our EB on grain free if its not necessary.