My .02.
Your young’n just doesn’t know several things:
- He may get to “feel his feelings” (more on that below), but he doesn’t get to cross certain physical lines in expressing his displeasure.
On the ground, that means we would never accept kicking or biting as we know that they know that those are acts of aggression. Your horse just doesn’t yet know that certain ways of using his strong, now-fit body to express things are verboten. He’s kicking out at the whip because that’s a natural, horse way of saying “I don’t like it.” And he’s doing that now because his stronger body gives him the confidence that he can perhaps “win” in a challenge with you. When he was weaker and less coordinated, he wisely “turned the other cheek” and lived to see another day. And at the same time, you are probably putting a bit more pressure on him now. You guys are just getting off a plateau and your training is going “up” on the learn curve again.
- He doesn’t know that his rider is his “biggest problem”-- not what’s going on outside the arena, not the horse passing too close, etc. He also doesn’t know that he can find peace and safety if he keeps his focus on you.
So when the other horse passes too close and you growl, he thinks that he now has two sources of threat, not one. And you are merely on par with that other horse. So when you get mad at him about threatening the other horse, he thinks that you are nuts and untrustworthy-- there was a threat to his body and you had no solution for him. You job (generally and long term) is to make not paying attention to you worse and paying attention to you great— you should be extremely predictable and fair, relevant and rewarding to him.
In this spot, see if you can ride him so that you are taking more of his attention when he happens to be near the other horse. Do something like transitions or a shoulder fore or lateral work away from the direction of the other horse and keep his attention on the job at hand. If he gives starts to give the horse a naughty look, give him a warning word with your voice, but don’t change your ride. What you are really saying is “I see your mind wandering… bring it back here… the job has not changed.”
If I had a horse like this, I’d get someone to ride with me who I could direct a bit. I’d want to determine how close we got, which side, which horse turned away and when, whether they were coming toward us or following us, whether I was “trapped” between the horse and the rail or not. And I’d just ride my baby in various situations with that other horse where the horse was far enough away that I could keep baby’s attention. Gradually, the space between us, or how that horse was approaching would lessen because I taught the general “solution” of keeping his mind on me. But I would position the other horse such that I saw my horse’s attention go there (with an ear and raised head and tension, or that nasty face) and the bring his attention back to me. If that means the horse is very far away at first, that’s fine. You just need to give your horse the experience of getting his head back in the game after a distraction. Make the distraction minor enough that he can afford to pay attention to you. Let him succeed at that-- find peace in returning his mind to you-- before you make the distracting threat of the other horse mare intense.
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On those feelings-- baby horses don’t yet know that they don’t get to tell Management just how unreasonable and unjust they are. So when your young horse thinks you are putting him at risk or want him to do something hard like go off your leg when he’s a tired, and you use the whip to say “I’m not asking, I’m telling you-- you must respond to my leg” he feels the injustice of it all. In this case, I would ignore his complaint and keep riding. With an older, relatively unspoiled horse, I’d punish kicking out at the whip. Those horses do know that there is a hierarchy and they would be testing it. But your horse honest-to-God doesn’t know how much he needs to submit to you yet. You get to be like the impassive judge with the attorney who makes objection after objection and you say, “Noted” in an impassive way, and keep on with what you are doing.
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You say his momma was also reactive to the whip (meaning that for whatever reason, she couldn’t accept it as a correction from her boss and get back in line. Rather, it sparked her moral indignation). And maybe Baby, therefore, was also raised in a Union home, a politically-engaged home, and he, too, won’t submit to the whip. Most of the time, these horses are sensitive, physically and mentally, and they are surprised by the whip. You want the physical sensitivity, but you also want them to learn to trust you enough that when you add the harsher correction of the whip, they accept it as part of being ridden.
Meh. His accepting the whip per se isn’t important. And I also bet that later on, when he understands and accepts his position in the hierarchy with you, he will accept and correctly respond to the fairly applied whip. My mare, who reminds me lots of your horse, has progressed this way without me making a special effort to tell her about the whip. Rather, as she has accepted her job and come to trust me as a fair and predictable boss, she has been able to accept more pressure (in this case the whip) from me.
But don’t focus on how he responds to the whip. Rather, teach him constantly how much attention he should be paying to you, and how much focus and “try” your ride requires. The whip is just the very last, worst, coarsest aid you apply when others have failed. Teach him to look for and respond to those earlier aids.
- The mention of your frustration is interesting. You get to be frustrated by a behavior of your young horse that you don’t know how to fix. At least you get to do that with us. But you don’t get to do that under saddle. There is only room for one of you to be angry and stuck at a time. You can get “angry” in a controlled, purposeful way, when you can turn that on and off at will to make a training point. But angry and stuck-- that’s what frustration is (and maybe a pinch of self-pity thrown in) isn’t productive. That’s why we want to teach horses how to find their way back to trying when they get frustrated. So we have to think about offering them a way out of their emotional cul-de-sac.
In your case, while you are pissed, I’ll bet he’s pissed. So you, with the bigger brain, has to figure the way out. Decide what would count as a praise-worthy response from him. Ride him to get that. Sure, wait him out and keep the same ride if he, say, stays tense and snarky after you use the whip. But be sure to look for a moment where he softens so that you can be “good cop” in that moment. This is how you teach them that the solution to their emotional problem is to stop paying attention to that emotional problem and start getting their head back in the game of trying to figure out how to earn a softer ride or even a walk break from their rider.
Hope this helps. Ask questions if I have been confusing.