The only dog I have that does it regularly is Diesel. The tool he uses is a pair of old jeans. I save them up to use as sleeping pads in the dog crates in the house. He uses them to mop up the crap when he craps in the crate before I can get him out to potty. It's not the best example but he is definitely doing it on purpose and it is a smart thing.
Dogs aren't usually smart in that way and while it's not a useful talent for the field, it is something that I'm glade I did not overlook for what it's worth. These glimpses into a dogs intelligence don't always come in a way that is glamorous or expected.

Considering Diesel is a cross between a whippet and a jagdterrier I'll take it. No one has ever equated either breed with the level of intelligence displayed by border collies and the like so for me, it's a great thing to see.
I know that most folks would imagine a dog grabbing a long pole and dislodging a critter from a hard to reach hiding place so the dog could finish it. I'll let you all know when I see that trick.
I am.
Repeal the 19th Amendment.