YES! I have encountered this with my own horse. He generally travels well but for some reason, the last time he went to the Raleigh show grounds we ended up in a stall without floor mats and he covered himself (and the adjacent tack stall) in a fine mist of red clay. It’s only funny in retrospect.
Tristan Tucker is using very basic Natural Horsemanship a la American/Australian Natural Horsemanship. It’s snazzy because he’s Australian and applies it to FEI-level dressage horses at European shows. I saw his demos and met him in person at Indoor Brabant. I suggest finding a bona-fide NH person who is QUALITY and yields results for horses in your discipline and work in person with this person. Timing is everything in this type of training.
When my nervous horse travels, I hang a hay net which is average hay layered with alfalfa flakes. He spends much of his time trying to get at the alfalfa, which derails his tendency to get upset. The alfalfa trickles down to the average hay and he then tries to get a that. For him, a slow feeder hay bag is counter productive because he gives up on the work required to get at the hay. However, sometimes he just gets upset for whatever reason, like the incident I mentioned above. He was stabled next to his trailer mate and could touch noses with the very very tall horse in the stall behind him. There wasn’t much I could do, that show was generally a wash. But other times, he traveled very well (calmly stayed overnight). Who knows what sets off a sensitive horse.
I learned that he loves stall guards and is happiest when he could look out and watch what was going on around him. This made him very calm.
i spend a lot of time walking my horse around the show grounds and grazing him around the arenas. I usually stand in the judges box while leading him. However, he has a disconnect between what he experiences being led and what he experiences being ridden, and sometimes all of the ground work doesn’t help the under saddle work much. My horse notes the changes in the shadows and I can’t train for that. But often, familiarity with a ring area helps.
i think it can really help to get these types of horses out to longing either in or around the arenas early in the morning, or hand walking them and doing ground work around the area early when one has the place to themselves. Many horses will recognize the familiarity of the area, but other horses (like mine) will notice the different shadow angles and this approach doesn’t always work.
I often to a certain quick set of exercises to supple my horse at home, and I use these exercises at shows to get my horse to key into the fact that he has to listen. I suggest establishing a very, very solid set of ground work and under saddle exercises that you can pull out when your horse is very upset to calm him. In addition, layered alfalfa! This all works for me and is just a suggestion for you.