I would only do one of two things. First, leave it. Second, if it has not been thawed more than an hour to an hour and a half you could refreeze it (once) if you want to save it.
If you thawed it by leaving it out or leaving it in the refrigerator you should just leave it and see if the snake decides to eat it. You should not try to save one thawed like this. It will be nasty if you try to refreeze it and use it again.
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