I can answer this and if Blues were here I'm sure he would agree, First of all the problems arises with backyard breeders,then you have people who love horses have no idea how to train and rescue them,they can't afford trainers b/c most of them WORK to take care of the horses.To them its a labor of love. They thought they had job security and the resources to care for them.Some of my friends and neighbors fall in this category. They weren't breeding horses,just trying to save them from being slaughtered.You used the phrase perfectly correctly, and I'm not offended. I was just explaining its origins, and then got sidetracked into my personal thoughts on free horses. Someone just told me about more free horses. They are all mature and were never broken to ride. I can't understand how people can keep a horse till it's in its teens and never train it, then expect someone else to want it, even if it's free. With the economy like it is now, this is coming up a lot. I think it's irresponsible to breed horses and then just let them languish in the pasture all their life. If, for some reason, you can't afford the horse anymore, then who else would want it? Maybe in some past time when horses were more in demand, it might get an owner, but these days, horses are being given away a lot because their owners can't afford to feed them any longer. What will happen to all these older, untrained horses?
Bottom line is this-- the reason there are so many unwanted animals is b/c irresponsible animal owners refuse to spay,neuter,and geld.
As to answer your question about older and untrained horses-- they go to the slaughter house along with the other much loved horses that people can no longer take care of UNLESS they can find someone who has room for "just one more" .
lol.......but on a serious note......old mate has 40 acres about 5hrs from here...and his so called friend...has left animals on his land...aimlessly roaming...a bull a donkey 2 horses...no care at all...old mate goes up every 2mths or so...his mate was meant to get the animals off over a year ago...I told old mate to call animal rescue....but he wont...cause he dosnt want bad blood between them...so it makes me very angry...also where im living...the neighbour with the big cats who attack alice...also has 2 dogs...one never stops barking...always escapes under her front fence.....craps in our yard on the walk ways....she even had the nerve to steal our rocks from garden beds...to fix up the holes in the fence...