"One thing people may not realise is that hedgehogs are nocturnal, and they like to run on wheels," said Dr. Hess. "If you are a light sleeper you may want to consider this." She also went on to stress how important it is for hedgehogs to receive adequate exercise, emphasising that they gain weight easily and exercise can help maintain a healthy lifestyle. Dr. Nelson explained that what kind of wheel you purchase also matters. "The wheel should have a solid floor rather than wired to prevent entrapment of the feet," she said.