These mammals are the most adorable members the family Erinaceidae (mostly hedgehogs), even though it is filled with cute critters. You probably have seen one of these before or at least know how they look like. They are vaguely rodent-like mammals that have many small spines on their back. They can roll into a ball to protect themselves. This particular hedgehog has been domesticated, so you can have one for a pet without too much trouble.