Beaver fever
Beavers...
Masters of their domain.
Able to dramatically alter their environment to suit their needs using sharp teeth, ingenuity, muscle, creativity.
But beavers may have met their match. Because there's another creature in the woods that can compete with them toe-to-toe, or tooth-for-tooth as the case may be...
Hikers!
Especially those who've been out on the trail for awhile. That odd-ball, slighlty off-kilter variety. The kind that carries a pair of "teef" in their backpack!

You might think that this was the work of busy beavers...

...but you'd be wrong!

A hiker with "teef" can do just about anything a beaver can!