Another amazing thing about being a parent? The extraordinary ability to know your baby has pooped. Sometimes it’s because you can hear it happening. Sometimes you can see their face get all red and determined. And almost every time you can smell it. But if your nose doesn’t actually know, and if you’re just not that plugged into your baby’s every grunt and toot, there exist diapers that will literally alarm you to the fact. And if that seems to be a product you think might find useful, then indeed, you should be alarmed.