I hope none of my farmer neighbors read this but we chase cows.
Most areas we ride have cows on both sides of us. Sometimes they will all come running when they see us, guess they think its feeding time. Anyway, at first it scared our girls till we started going after the cows. A horse isn't going to be afraid of anything that runs away from it. Act like a cowboy and try to get the llamas cows whatever to move away from you while on your horse. We chase everything, deer, cows, turkeys, dogs whatever scares the horses. Not sure if its proper but it seems to help build confidence in the horses. Do a YEE HAA and chase those critters away