I'm with you Arktinkerer, and after three days of feeding the little critter I would probably view it as a pet and be unable to kill it anyway! So I think I'll pass on the whole idea.
Now -- if only someone could come up with a sure-fire way of keeping voles from destroying my garden. I am waging an all-out war here. I've lined all the raised beds with hardware cloth, set traps, used repellents, etc. I have a terrier who is pretty good at catching and killing them, but he's no match for the hoards of the little devils we have.