No, I’ve owned several GSDs throughout my life and they all ate like bears out of hibernation. I do know that a diet of higher quality dog food helps with their digestion system and eliminates diarrhea.
Try feeding yours a high protein ‘grain free’ brand (’Pure Balance’ @ Walmart). Put a little warm chicken broth in it. If he’s healthy, he’ll go crazy for it and you might see a great improvement.
Thank you for the reply. I will get a small bag of the food you suggested and see how he reacts. Obviously, at 110 pounds he has eaten enough in the past! It’s probably that he is skittish after having the GI problem.