[Source] If you see them, please call the numbers on the flyers!
They were last seen in Alexandria, VA near South Van Dorn and Franconia intersection, adjacent to Thomas Edison High School. If you're in the NoVa/DC/MD area, please keep an eye out for them.
Their owners have a great website with lots of resources-- flyers, business cards, pictures, and a Facebook page. It's located here: http://www.findchamocooley.com/.
Here's hoping Chamo and Cooley make it home soon!