The Squirrels Eat it Mommy?

One of Elias' highlights of our MT vacation was going potty on the side of the road. We put him in a pull-up for the long car rides, but he would often say he had to go potty. We certainly wanted to encourage that, so we had him go outside a handful of times. He was successful at both peeing and pooping (I think he prefers outside to most public restrooms), but wanted to know if the squirrels were going to eat his poop. Where does the kid come up with these things?