Labradors are completely focussed on their stomachs aren't they? When I was a child we had a golden retriever who was trained not to eat anything unless he was told to, even food in his bowl, but I don't think there's a dog trainer in the world who could train a labrador to do that.
LOL the ONE time I EVER baked a cake (chocolate), I left it to cool on the side in the kitchen, thinking it was well out of harms way. Oh no - our lab managed to somehow stretch just far enough to nibble round half the edge with his teeth. Quite decorative actually