There are Unit members who have never eaten a human. #4 has eaten hundreds of dogs, cats and other animals, but never a human. Neither has #8. And #6, among others, will take a few bullets and still carry you off to jail alive and well, if maybe a bit bruised.
The female Unit members are by and large less generous. #9 has digested four would-be rapists and counting, #7 has eaten half a dozen people (some intact and some in pieces) and them there's #3.
As far as anyone knows, no one has shot her in a deliberate effort to get eaten. Then again, how would you ask them? With an endoscope and a great deal of haste?