All of the pictures that I have seen show the dog on a short lead and no food anywhere within reach near him, only bare walls; and the messages are done in dry kibble, not fresh food, so it won't have much scent. The emaciated state of the dog is pretty good evidence too. The food on the wall satisfies you as evidence. It doesn't satisfy me. So?

Why do you find it frustrating that this story upsets people? It doesn't mean it's considered equal in importance with the other atrocities that go on in the world, just that it's upsetting. It certainly won't give you any idea as to what people's priorities are. Mine anyway.