I bought one at a reptile expo last week and it seemed fine. Friday night I gave it a small f/t rat and it killed it and let it go and moved away from it. So i picked it up and tried again, it killed it and did the same thing. It then proceeded to get all pissy and was striking at anything that moved including me. I left the rat in and it disappeared overnight. The boa was fine the next day and had dropped some urates, so I removed it to clean. No problem. I found some more urates this morning and the boa wants to strike anything that moves. It has a warm side hide and a cold side. Warm side is 90 degrees, cold side is 80, humidity between 50 to 60 %. Any clues? Are they just naturally nippy one day and fine the next?