Suzy,
I'm just giving what advice I have gleaned from 5 years' experience of feeding a RAW prey model diet, and what I have learned from many other prey model feeders. You might consider joining
this group, to read and ask questions about acceptable bones. Also, the link in my sig is a good source for learning about prey model feeding - which includes acceptable/unacceptable bone sources.
You can pick up rabbit in your local supermarket. It's rather pricey, but it can be found. An asian market might have squirrel, or some folks do have friends who hunt.