I started Aldous on F/T but soon I found that the Pet Store in town was horrible with shipments and they didn't have any in stock, after a few days I got worried and decided I had to feed him something so I started feeding him pre-killed and he will never go back. I tried offering him a F/T one again once the store got some back in and he just turned his head. So, it may be difficult to get your snake to eat frozen/thawed... but they may still eat pre-killed. If safety is your concern that should do the trick.

I, at first, felt bad about snapping the mice's necks but that quickly faded whenever I stepped back and just thought of it as feeding.