My mare tends to be claustrophobic. She usually loads fine (4 out of 5 times), but sometimes she gets really anxious. I've noticed she loads better when I take the pins out of the divider and swing it to the side. That would be fine except my trailer is old and the pins are extremely difficult to get out. Today I couldn't get them out at all.
I know some of this is a training issue, but I think some of it has to do with the trailer too. The trailer is almost completely enclosed and it gets really hot in there. It was 90 degrees outside today, so inside the trailer was even hotter than that.
If I take the divider out, I would still be tying her to the front. That way she could travel either facing forward or at a slant.