500g is quite big - massive, honestly, for a 2 month old. Some hedgehogs are naturally larger though so what is normal for one hedgehog could be overweight for another. Have you got a photo of her? My boy is 480g, but he’s 1.5 years old and fully grown. Are you positive your scales is accurate? And she’s definitely only 8 weeks old? Is there a possibility she is older? My guy was 175g at 6 weeks. So this is why I’m doubtful.