We introduce you to the small dog who didn't back down from a big cat. Here's how a beagle mix sent a mountain lion running up a tree.

A man walking his small dog in Boulder, Colorado, on Thursday night was confronted by a mountain lion that apparently saw the ...

A family in Tustin, California were shocked to learn the cat their dog chased up a tree when they let it outside in the ...

The dog chased the mountain lion up a tree, where the cat stayed for nearly seven hours. "She just went bolting and all of a ...