Yes. You are going to want to get her to the doctor immediately. If it is a brown recluse, it can cause a lot of damage if left untreated. Even if it isn't a brown recluse, it is as rayoflight says, it could be something exotic from one of the zoo animals.
If the infection is left untreated, it is possible that a piece of it can break off. If this happens it could travel to the heart, and even cause death. TAKE HER NOW!
If the infection is left untreated, it is possible that a piece of it can break off. If this happens it could travel to the heart, and even cause death. TAKE HER NOW!