Hibernate because when they sleep they don't use any calories so thus,they can survive the winter without waking up for food. This is because also their metabolism slows down so much that it consumes little to no calories a hour keeping its vitals stable and not having to wake up to ''refuel" it's self.
Answer:
Due to insulin resistance, it is a bit hard for their body to naturally break down glucose(<em>a form of sugar</em>) like a normal body would.
