Meet our Hippo Dreamy Hottie. With a humongous head and enormous body, he's the second-largest mammal on Earth – despite his tiny legs and short tail. Hippo is very chilled. He likes to lie down with his eyes closed and have his tummy rubbed by his humans. That's where he keeps a little pouch that can be popped in the microwave and heated up. Give him a big hug to feel the warmth, then close your eyes and see who can sleep the longest.