But it is TRAINING that is turning her into a safe, responsive horse.
bsms, may I suggest that it is the TRAINING as a VERB, not a noun, that makes all the difference.
I had a horse we wouldn't sell because we felt she was too dangerous. We just went day by day, never quite deciding she was hopeless, though she was always fearful.
Then one day we went to a clinic where the clinician said, about the wild colt he was working, "He has to learn to FACE HIS FEARS."
So that's what I concentrated on, facing our fears, not getting rid of them. Yeah, she, and I too, had plenty to fear, but eventually, it became just so "normal". Spook, look, move on... Everything worried her, but nothing was "too much." She never learned to be "good"; but our INTERACTIONS became a strong connection. From what I've read, I believe you know exactly what I mean.