Don't have my BP yet, so this is hypothetical.
If your snake starts fasting, not a stress thing but rather just fasting because they do, how do you deal with it?
So, I guess a better way to explain the question... you go to feed it a F/T, it doesn't eat. Ok, you can't re-freeze the mouse, can you? I guess you throw it out (wife & kids will not eat it). Do you try again the next day? Wait a week? If the next day, and he doesn't eat again, do you just throw away another mouse? Do you move to LIVE until he eats?
I guess this is less of a problem if you have multiple snakes, cause you can just feed the next guy.