Wanted to put this out there to see if anyone has ideas. Vet is super puzzled.
5 year old WB, clean vetting, clean xrays. When you pull her out of her stall in the AM and toss her on a lunge line or free in the arena trotting, she’ll head bob on the right front for approx 60 seconds, and then it will completely vanish and she will be fine for the rest of the day (riding, lunging, whatever). Vet has flexed and flexed and nothing. If she is pulled from her turnout in the PM, she is fine. It is JUST in the AM when she gets out of her stall.
Thoughts??