'Untamed': Wild Mustangs Roam the West

Shown here are two mares in Galaxy's harem. Matt Dillon said there have been a few cases where the mares have rejected the male horses. "A young mare got stolen from her family for the first time and she went with a young bachelor. He wasn't very experienced and didn't really know what to do and he just kept going and playing with his little buddies... after a couple of days she just left him." (Bill Weir/ABC)