Pat is right, AND there are 4 different basic types of horses who say no in 4 different ways! (also taught by Pat): your bucking & backing horse is a classic Left-brain Introvert, which means he's always seeking to dominate, to have his way, & his slogan, if he could verbalize, is "MAKE me!" or "What's in it for ME?"
I highly recommend your getting the horsenality info on how to deal with this type, before you get hurt/killed, & a potentially great horse becomes unmanageable.
Please don't GET on, with him in his present condition! He needs the relationship with YOU as leader far more developed (can you say groundwork?) before you even think about getting on!
You'll learn in PNH horse psychology that no horse is being naughty, he's just got his horsenality. Please don't lay on him that it's naughty of him, if you're frustrated/angry, he'll see that you aren't therefore emotionally fit enough to be his leader!
Dear Lord. Horse'nality... one more way to make money off an unsuspecting public. Wrong in more ways than one but the main one being that this gal or others could easily be injured or killed. Parelli is the last thing you want to throw at someone with a dangerous horse, imo.
It's this simple. The horse is either:
In pain (that flares up on occasion an only presents when he is being worked- unlikely)
An a$$hole from bad training and being babied by people who are afraid of him
A psycho with neurological problems.
I vote for one of the latter two or a combination of them both.
A few clips from an article by a trainer about Captain- a psycho horse she tried to work with: 3. Not all horses deserve to be saved.
When a horse is willing to injure himself in order to escape what he perceives as a bad situation, his rider will NEVER be safe.
If he has no regard for himself, you can bet you will never cross his mind in a high stress situation. 5. All horses deserve a chance.
I believe this with all my heart. I will never regret riding Captain. My regret comes from letting it go on too long. Unfortunately I was really fond of the stupid *******. I have notoriously bad taste in men too.
From mugwump chronicles: Captain
And one more note- in wild herds of horses (which live near me) you don't see the lead stallion being "emotionally understanding" to the herd members. You see him kicking, biting and knocking them around when they don't obey his lead. The stallions continually get 'frustrated and angry' and tend to do a lot of a$$ kicking.
I don't recommend being abusive- but you need to be ready to take your horse in hand with a few good whacks when absolutely necessary.