I've had my hedgehog for a couple of months and he has done a complete 180 on me. He used to be very shy and curl up in a ball if you even blinked. After a while he started to get used to me, but was still pretty shy. All of a sudden, about 3 days ago, he is completely different, he doesn't curl up at all no matter what I do and his sleeping pattern has changed. He no longer sleeps in the day, he is up all day long and sleeps at night. He has also started biting. Does anyone know what might have caused this and what I can do about it?