Being a PMU baby has nothing to do with it, beyond that PMU babies usually are handled very little, if at all, before being sold
Along with raising horses ourselves for many years, we also bought several PMU colts around the age of nine months, that had not been handled. All turned out fine
It is in correct handling that creates a dis respectful horse, and why trainers would rather take ahorse to train that has not been handled much, as opposed to one that has been handled incorrectly, thus becoming that proverbial ‘barnyard pet’, which has no respect of people.
As endurancerider mentioned, such a horse has to have negative training removed, before any good training can start, and the horse will never have that clean slate of mind as a horse that was never spoiled in the first place, thus will revert, given the chance
Far as PMU babies, what often occurred, is because they sold cheap, people with little horse experience bought them at times, totally un prepared far as working with an un handled colt, and when they found themselves over their head, dumped them. Thus, many wound up in rescues.
I agree that you sound like you are in over your head with this horse
We are are not sure as to how ‘broke’ this horse really was when bought, as many people buy a horse, trying that horse out in some confined area, or just following along after a well broke and quiet horse, then are surprised when they attempt to ride that horse out by itself, after buying it, beyond the comfort zone of the horse
I can give just one example of this scenario. The person who bought our last stallion, after we gelded him, had tried out a show mare before him, and told me of her experience .
This buyer had a policy of always trying a horse out three times before buying, with one ride being out on a trail.
She rode that mare twice in the arena, and she was wonderful, thus almost ready to buy.
She then took the horse down the road. (might have been with others or by herself )
The minute she turned that mare towards home, she reared and tried to bolt.
Needless to say, end of sale. Our horse passed the test with flying colors!
Yes, the mare was under worked and over fed, but I still don’t see that as a greatly excuse, if she was truly broke
Some of our horses, esp hubby’s, don’t get ridden all winter. In the spring, except for being a bit out of condition, they ride fine.Ditto to mares that we used as broodmares for several years, then gave them a re fresher course as riding horses, before selling them, after we quit breeding
They did great, because they were broke before going into the broodmare band-a policy of mine
Some sold to the other end of the country, after just a month of riding, and we got letters on what great trail horses they were-more than expected.
(one of those mares by the way, was a PMU foal that I bought)