What I don't understand is why you only want to feed live once? I mean nothing against the live feeders because I agree if proper precautions are taken it's just as harmless as feeding f/t, but I can't even count the number of times I have seen threads regarding the stress and difficulty people have had trying to switch FROM live to f/t, and you have a snake that takes f/t with no issue and you want to feed it live ONCE? Sounds odd, and it sounds like you weren't prepared in the least. You probably should have looked into this stuff BEFORE you bought the poor rat that your snake doesn't even want right now.