I have a 15y/o mare. I have had several discussions with many of you and believe that our issue is that she knows she can take advantage of me (im a beginner). My question is this, could bringing another horse over so she's not alone help her or make her worse? I have avoided bringing my husbands gelding over, because he has been known to bite his pasture mates and i don't want him to bite her. What do you think?