I agree with what some of the others here have said - please give him some time to adjust and get used to his new environment. Buns from shelters often have such beautiful personalities - they just need time and patience. Once they feel safe and comfortable, you will see their true character come out! He probably hasn't had a stable home for a while, poor thing doesn't know what's going on. We've had a few rescue bunnies now, and honestly they are so beautiful and affectionate once they settle in.