Am I the only one who sees that she looks untrained on barrels?
Nope...I see it too!
I am seeing A- She is being asked to much and frazzled and confused. B- She is lacking a lot of training (which see) so isn't even ready to go that fast no matter if at home or show. C- She is blown up...but that isn't really popping up as I am not seeing other red flags that point there.
Start taking her to shows and just let her see, walk her around on a lead, make her stand tied to the trailer, give her some hay and just let her get used to the atmosphere. Then get on her and ride her around the grounds. Take her in the warm up. Do a training run where you can walk or trot the pattern. Speed adds excitement, more horses add excitement. She needs to learn to keep her head while everything is going on before you ask her to run a pattern.
Ultrasounds? MRI's? Cat scans? If none of those were used, than you simply cannot rule out this being pain related yet.
There could be all sorts of things going on internally that are bothering horse.
Would also imagine she is past age of being able to comfortably doing this as well. 15, while not ancient by any means, has with it bone changes, and body changes.
She may be anticipating the pain of having to compete, once you get to show grounds and just lose it too.
But I am with the others who say there is a reason horse was down for 3 years. And after watching her in the videos, I too am wondering if horse was actually competed on, as she isn't showing any of that in videos.
Well the OP sure has some lies going on.. Go look at the NO Time Barrel run thread an it will be proved. In this thread it says the mare is 15 I believe in the other and on her profile it says 13, and has never been shown before she owned her, in the other thread however it says she is a finished barrel horse, in this thread it says she was turned out three years, the other says two years. Wow.