Easy Horse Star
To get a horse star easily, first get your horse out of the barn. Make sure that she has at least two or more hearts, or you can't ride her. If she has two or more hearts, mout her by pressing the X button. Than, ride her untill 6:00 P.M. After that, she should have one training star filled in. If not, repeat the process the following day untill she gets enough stars. Remember, stars are used as stamina in the Horse Races!