Fair warning to Hubby and others with a sensitive stomach: even I can see this was a gross thought.
I just used my Ped Egg: you know, those foot file things? It is great, by the way. So I opened it up, afterwards, to dump out the little powdered foot pieces into the trash. And I thought, "Hmmm. I wonder if the dog would like this, sprinkled on his food?"
I didn't do it, ok? It was just a thought.