9 Wild Horses. S Carol Johnson

articles I could find tell you that he will kick the colts out between a year and two years old. That depends on how fast the colt matures, and how tolerant the mother is. There are stories that the colts will even try to mate with their mothers if left in the herd. The stallion will give them 2 warnings and then the 3rd time, if the colt hasn’t found it prudent to leave already, the stallion will make sure he stays gone on the 3rd attempt.

      There isn’t nearly as much information on the web about what happens to the yearling fillies when they come into their first season. I did find some and it explained a similar story in that the lead mare somehow knows the stallion can’t mate with his own offspring so she kicks out the fillies when the time has come. I have found that it is not common knowledge about fillies getting kicked out of their birth herd. Also, what I witnessed was not the lead mare kicking out the little gray filly, it was the stallion. It is probably worth mentioning here that Bossie’s two year old filly is still with the herd because was not sired by this stallion, but rather by the first stallion I met. At this point for lack of information I am feeling at a distinct disadvantage and I am not sure whether that was just an oddity or if there is another version of this experience just waiting to be written.