Isoflurane is the safest anesthesia to use. The animals most at risk are the young and old and the sick ones. But no one should have their animals operated on when they are sick. Halothane is another commonly used aneshtesia but I doubt , I would hope a vet would not use it on a ferret, it does not process out of their system as rapidly as Iso. Okay, question here, and I need Ideas...I will be traveling in august from Seattle washington to kentucky with 2 children..ugh..5 ferrets and 2 cats, in a 1999 mercury mystique,,who should I put in the trunk??!! JUST JOKING.. but seriously how have others managed to do this ? It is going to be a longgggggggg ride. June ===== Behind every successful man is a WONDERFUL woman! [Posted in FML issue 3005]