We first featured Maddie, the coonhound with impeccable balance, a little over a year ago, when she was off with companion Theron Humphrey on a documentary project across the United States. What have Maddie and Theron been up to since then? Well, as it turns out, they’ve been busy.

After Maddie’s hilarious and heartwarming photos brought her viral fame, she inked a book deal with Chronicle Books for Maddie on Things: A Super Serious Project about Dogs and Physics, a compendium of the Instagram photos taken of Maddie on her journey.

Update: Maddie the Coonhound in other

Now Maddie and Theron have hit the road again, touring the country in support of Maddie’s book and collecting images and interviews for a new documentary project, Why We Rescue. While on tour, they stopped by the set of Today for an interview (and, of course, some perching).

Update: Maddie the Coonhound in other

Update: Maddie the Coonhound in other

[photo credit: NBC]

You can follow Maddie and Theron on the road via their tour blog, where the interactive map will let you know when they’ll be passing your way. If you can’t get out to meet them in person, you can keep up with what they’re up to through Facebook and Twitter. If you want to help support Maddie and Theron on the road (or just have some really good cheap fun), download the Maddie Cam app (for just under a buck – half a gallon of gas!), the proceeds of which help to finance their trip. You can amuse yourself superimposing Maddie on anything you can take a picture of. (Here she is on a bush outside my house. Seriously, best 99 cents I ever spent.)

Update: Maddie the Coonhound in other