My previous mare refused to load. We bought her at an auction - don't know how they got her in the trailer to get her there, but we had to use a chute to load her to bring her home. Thank heaven we just use a stock trailer!
Unfortunately, on the way home, the truck broke down - this was long before cell phones!. We were about a mile and a half from the nearest house. Unloaded Sugar, saddled her and rode to a friend's house to call for help. Rode her back to the trailer and only then remembered how bad she was to load. I'm so glad I took my saddle off of her before we tried to load her. She reared up and threw herself over backward, got back up, pinned her ears, cow kicked at my father in law (nearly got him!) and generally pitched a huge hissy fit.
Hubby and I wondered what the heck we got ourselves into. Sugar rode great - she was by far the best horse I've ever had. She just would not load when we first got her. We all stepped back and scratched our heads. Father in law will be the first person to admit he knows nothing about horses. We were beginning to think I was going to have to saddle her back up and ride her back to their house - about six miles or so - not a big deal. They also have a chute we could use to load her back into the trailer once the truck was fixed.
Father in law got the idea that maybe I could load her if they stayed completely away... and it worked! I have no idea why - but she followed me in with very little hesitation. All I can think of was maybe she decided I was boss after our little ride (she was a bit stubborn in spots, but I was stubborner - if there is such a word.) I never had any trouble after that - but it was months before she would load for my husband.
My current mare, Dancer is almost the exact same way. Unfortunately, her previous owner was pretty scared of her and at the same time was too much of a softy, so getting her loaded was a real pain. (Plus, that stock trailer wasn't ours and was actually too small). Now that we again have our own stock trailer, all of our horses, even baby Rain, are going to learn how to load!
Plain Old Dee, horses Dancer and Rain I believe in dragons, unicorns, good men and other mythical creatures!