Cat Poop and Paperclips

I swear my 20 month old son is going to kill me. Somehow in the last few months my sweet baby boy has morphed into a walking vacuum with microscopic vision that's stuck in "search and devour" mode. He can (and does) find the smallest, grossest possible things I have managed to overlook in my constant cleaning sprees and eats them. To date he has eaten dead flies, dirt, hand sanitizer, coffee grounds, hair, popcorn seeds, a paperclip and his crowning achievement- cat poop. I kid you not, my son actually ate an old piece of cat poop still covered in litter. I'm sure you can imagine the call to the pediatrician. Once the laughter on the other end subsided, I was informed to check his stools now for worms. Worms!!???? I mean, I know there are worse things in life than to find worms in your child's diaper (cancer, nuclear war, my daughters dating, etc) but...I mean...worms. So far we're in the clear, but the day I do find worms in his poop is the day my son will kill me.