My Boa Wont Eat!!!

[Slytheren]

Fellow boa enthusiasts, I need your advice/help. My six year old columbian boa will not eat. we recently moved and she was given time to get used to her new surroundings. however, she has simply refused to eat a f/t rabbit and is now in a stare down contest with a live mouse! What could be wrong? Temps in the cage are ideal, she has adequate water and a good hiding spot. She has begun hissing a lot which is really uncommon for her.

Your thoughts are appreciated.