That was the case with Melon, a senior Chihuahua-Pug mix who "completely shut down" at her shelter. Despite this, though, a soft-hearted adopter took a chance on her, and the personality shift ...

Related: Tiny Chihuahua Who 'Looks Like Dryer Lint' Is ... the Puggle is a Beagle-Pug mix; and the Pomsky, a cute blend of a Husky and Pomeranian. But one crossbreed is far rarer than any of ...