An experiment

One day when I was in a London suburb, I was feeding some pigeons some bread. The pigeons did not seem to be particularly intelligent, but that's okay, we can't all be rocket scientists. I spotted a cigarette butt on the ground. I decided to try an experiment, because I doubted that pigeons could be that dumb. I tossed it to a pigeon, and was horrified when he ATE it. D'oh, sorry Mr. Pigeon, I hope it all worked out. Of course, how stupid was I to not think he'd eat it?