We often think a certain bad handling or training experience caused a problem. But it’s just as likely that the problem predated the bad experience. Most farriers are not rough on the very well behaved horses. But take a horse that is already having some pain or balance issues and starts pulling away or leaning or fussing. These are the ones that a temper prone farrier having a bad day may well go overboard in the effort to get the job done. In other words, when I hear “had a bad experience” I leave open the possibility that the horse had prior issues. Those issues plus the disastrous human response combine to make a bigger problem. Especially as the existing issues aren’t addressed or are called naughty or trauma.
When I started clicker training I found that my mare could learn a trick in one 20 minute session and remember it forever. As long as the cue was clear and she had no larger objection to the trick, it wasn’t physically difficult.
So yes they do learn fast and remember.
Dr Andrew Macclean says it takes 9 times for a horse to start generalizing about a situation, and change their behavior. So if you are trying to change a behavior and you keep getting in a fight, or have one good one bad day, nothing changes. You need to construct multiple sessions that make the good behavior happen.
After I went to one of his lectures I had a lightbulb moment about my older mare. I had made her ring sour years ago and had done many hours trying to work through it. I realized that all I had been teaching her was that we fight in the ring.
Building on the idea of 9 positive experiences I opened the gate of the outdoor arena on a quiet day and went for a trail ride. After she was happy and forward I trotted into the arena, did a small loop, and left before she realized where we were and started to get pissy. I did trot in and out 3 times, back on the trails, then in and out 3 times, back on trails, in and out again for a total of 9 trots in and out. I did this 3 days running and it really reset her brain about the arena. If she started getting sulky in there agsin I did a few sessions again. It really helped repattern her expectations of the arena. It could just be part of the trail experience.
It’s harder to know logistically how to do this with a farrier who is on a schedule. If you trimmed your own you could do a little each day.