Getting your horse accustomed to being in a trailer will take time, so don’t rush it. Work in small increments and make sure to reward your horse for small victories along the way. Start by training your horse off the trailer to move forward with a tap from a training stick or your hand. Once it is responding consistently to these cues, move to the trailer and give it the same cue to move forward.  If your horse cannot go all the way to the trailer on the first try, don’t try to force it. It may lose confidence in you and develop a habit of resisting. Once it makes it into the trailer, reward it and let it relax. Don’t rush to close the door behind your horse the first time; in fact, it’s okay if the animal backs out the first few times. The more comfortable and confident your horse feels, the easier it will be to load in the future.