Ok, so my rat has bitten me twice now. Hard enough to cause it to bleed for several minutes, I figured this was because I scared her. But i moved her into a new cage and now she tries to bite at me and the dog through the wires of he cage. And as I was holding her just now, she was walking around as i was lying down and watching I Robot. Apparently my hand was in the way and she let me know it. She gave me a firm bite on the finger wich told me to move my hand and she walked right on by. It wasnt hard enough to break skin but it was hard enough that I cant still feel it. Why is my rat so aggresive? I thought that these were supposed to be gentle and friendly creatures?