Really, really bad dog Shade!!

Shade ate about ten Hershey bars and just now threw up the evidence on my bedroom floor!!! Jeff and I were watching the ER finale and now he's on the floor using the carpet cleaner and scrubbing dog barf residue. I swear, this dog is nothing but a pain in the ass, and frankly, animal lover that I am, I don't see the point in having a "pet" like him. But Jeff goes back and forth, and I know he would never get rid of this beast. Perhaps I can slowly poison him with a wee bit of arsenic sprinkled over his food each day? Now, if only I knew how to find arsenic..........