First let me say that was a really dumb thing to do. You are very fortunate that the person (who you couldn't really see) didn't have a gun and didn't have plans to rob (or worse) hurt you and/or your horses. In the future stay home and call the police it isn't worth your life to see what is up. OK off my soapbox.

It is really hard to tell from the photos. At first I would agree they look female from the hair but the build seems more male. But with the way kids dress these days who knows. Sorry I couldn't help more.