Originally Posted by Shadow Puppet
Mainly what we work on in lessons is trying to get her to take the left lead because she really doesnt like to take it. Out of a lesson when I am just working her by myself she will take it lots and we have very succseful rides...sometimes without a buck in mind.
I would hazard a guess and say she is sore or stiff. Going to the left aggravates the issue.
Also in a lesson you are likely more stiff, tense and pressured. Your horse picks up on that and responds in kind.