When I first got my horse, it took the guy who owned her 45 minutes to load her up himself. The reason she was so scared was because the trailer smelled like cows, and Jackie had never smelled a cow in her life. Is the trailer your horses regular one or is there something that might pass under your radar? I haven't trailered my horse since I got her a year and a half ago, but I tried loading her for fun. She was wary at first, but I would walk her in a circle then walk up to the trailer, let her check it out, then walk away before she lost interest. She eventually took a step in, then I immediately let her take a step out. We eventually got her all the way in, etc. etc. etc. without her freaking out once, which was a major accomplishment, considering our history. The only problem was, she didn't like waiting, and she immediately tried to back out. It wasn't so bad until I tied her and tried walking out of the stock trailer and she tried following me and almost flipped the trailer. My old trainer used the work vs. get in the trailer method, and altough it took a while, she didn't try backing out immediately and it ended up well enough. Also, don't wait for the last minute to work on trailer loading. Use short, succesful sessions, and end on a good note. Also, prepare your horse for the worst. My old trainer took a crop and banged it against the metal to make load noises and stuff like that. I don't know what your attitude towards your horse is, or if these methods will work for you, but that's my advice. HIH!