Will Falconer, DVM Moderator
Hi Lori,
Exposure to rabies is a very low risk for a mostly house dog. If she ran off on her own a lot on a 100 acres of wilderness, it'd be another story.
More risky is this: what if she bites someone, for any reason? With no rabies vaccine history, she's classified as a "non-vaccinate" and will likely be faced with quarantine for 10 days to be sure the bite wasn't because of being rabid.
Here's an earlier blog post on this very question: https://vitalanimal.com/right-choices-rabies/
All the best in this tough decision. I you opt for the one vaccine, I can send some remedies to give before and after that can potentially modulate the damage that's possible.