It's sort of impossible to know without knowing what kinda of ants you have there. Big bull ants or even small fire ants could certainly pose a risk. Standard small black house ant types shouldn't be an issue, one or two might be irritating but easily removed. Possibly the only risk would be if she stood on/around a nest for a long time she might end up covered in them and receive a couple of small bites. But I don't think she would hang around long enough to get covered in them. After all, bunnies in the wild have to deal with ants too.