MDB
Well-Known Member
Just a thought, you say your mare is the boss in the field, however, when she is ridden she is under your control, this may make her feel vulnerable. I've noticed that my old TB, who is always bossed about by my other horse, will happily nip him given the chance if boss horse is being led from the field and he is loose. I have no doubt that if I rode boss horse and led the old boy, there would be trouble. Herd dynamics can be quite fluid and one horse ridden, one led might change them.
Yes, the dynamics are very fluid as you say. It may be something to do with that. If only I could speak 'Horse'!