Help when loading?

[SR3101]

Hi, my horse has recently refused to load into our trailer. We've taken him out a good 7 or so times for lessons and shows, and he's always walked on like a dream. However, last time we tried to load him, he refused to move. He started backing up and threatening to rear. We tried comforting him, using food (which he didn't even look at-very strange for him), taking off his travel boots, using lunge lines and we use a monty Roberts head collar with him anyway. I can't understand why he's suddenly started to do this, he's not fallen or had a bad journey so is he just being stubborn or is there something wrong?
We're planning to have a day of walking him on and off of the trailer like we did when we first bought him but any advice would be welcomed! Thank you

 

[eggs]

This usually happens after they have had a bad journey. Have you checked the floor is sound. Also go for a little ride in the back of the trailer if you can to make sure that everything is sound, nothing is rattling about, etc. Has some-one driven too fast with him in the back or taken a corner too sharply?

 

[SR3101]

i couldn't be there on his last journey, but the people that had him have assured me that nothing happened. Someone could have spooked him but I just don't know. The trailer's just had a full service, it's in top shape

 

[Cowpony]

If you normally use a Dually headcollar could the people who took him out have forgotten to move the lead rope onto the fixed ring under the chin once he was on board? If they left the rope on the moving ring and travelled him like that I can imagine that he would have experienced pressure every time the trailer swayed, and that wouldn't have been very comfortable.