In the wild, hedgehogs defend themselves using a few different strategies. When they feel threatened, they are known to curl into a tight ball, exposing only their spiky outer layer as a defense mechanism. Their sharp spines act as a barrier against predators like foxes, owls, and other animals. Hedgehogs also have the ability to release a foul-smelling odor from their anal glands as a deterrent. Additionally, they may make clicking or hissing noises to ward off potential threats.