My daughter is a barefoot girl too. I have to admit, after growing up on a ranch as a child, nothing bothers me. However, last year our friends daughter fell and cut her knee on a goat stanchion. A few stitches, no big deal. 2 days later she is being flown to Oakland with a horrible flesh eating infection.
http://www.pressdemocrat.com/article/20120706/articles/207061081
Missy lost the main muscle in her thigh as well as most of the skin on her calf. Thankfully she is doing great (even playing softball!)
I tend to be a little more cautious now.