Piper was rescued after being abandoned, and has since grown to love everything about her new life.
She may be tiny, but Piper has proved that she can keep up with pretty much anyone - even a dog who's three times her size.
Piper was recently playing around with her friend Iggy, and even though Iggy is much bigger than her, Piper wasn't scared. She ran and leapt just as well as Iggy did, and proved that she can most definitely hang with the big guys.
Watch Piper and Iggy's playtime here: