Any one of the recent realities: excessive heat, intense thunderstorms, earthquakes, wild fires, and a near total solar eclipse could explain the wacky behavior of these young mares one morning. However, like a pack of twittering girls, these fillies are tuned into any excuse to giggle and skitter about for frivolous reasons. It should be noted though, this is still evidence of real herd behaviors that lead to success in the wild. Sticking together and fight or flight are essential tools. Even so many generations removed from authentic wild and feral ancestors, horses that are given the opportunity to live and problem solve in a wild environment tune into their instincts in a relatively short span of time. The information is still in their DNA.