Is there ANY way to change her mind?
Her response, while completely inappropriate and borderline criminal was obviuosly based on fear and ignorance.
And while I know spending an hour at Starbucks, sharing a pumpkin spiced soy latte, talking about how golden retrievers bite more children than snakes won't change her mind, it may initiate some self reflection and soften her over time. Who knows, she may come around.

BTW, I recommend Starbucks because they are CCW friendly.