If you own a dog, you should know to pick up your dog's mess when you're out and about for a walk. But unfortunately, some dog owners don't.
One nine-year-old wants dog owners to know that doing so makes you a "lazy idiot" - and if he's responsible enough to clean up after his dog, you should be too.
One day a walker in the United Kingdom spotted a laminated warning note stapled to a wooden post and it was clearly left by someone who was fed up.

The note read: "Clean up your dog poo it's disgusting. I hate it its always on my shoes and my brothers and sisters which then gets walked into our house [sic].