In brainstorming how to get small bones into SKF for her calcium needs, I'm thinking about new ways of sourcing. Hunting mice seems like a stretch, and for sure I'm going to look for hobbyist (e.g. reptile supply) sources.
Having grown up and lived rurally most of my life ... I would be concerned w/ pesticides (farmland) and internal/external parasite transfer from the mouse to your cat. I know not all captive-raised mice are 'clean' but I imagine being raised in a controlled environment is better than the uncontrolled environment wild mice come from.