I think that this author is unfamiliar with the subject. My rescue has neither behavioral, emotional, or performance issues. In fact, for $500 I have received in return a horse that has put smiles on my daughters faces and ribbons in their pocket. She has placed at small shows and big shows. She has done barrel racing, pole bending, saddleseat, dressage, hunter, jumper, been a lesson horse, been a ballerina at a dress up contest, and been the apple of my eye. If your goal is scaring people so that they turn up their nose at even looking into a rescue then you have done a good job. If your goal is to write a balanced article expressing the pros and cons then you should try again. Oh wait, damage done.
I agree with Melissa. Most rescues actually do work with their horses: riding, training, etc. Horses that are available for adoption have been worked with at-length as well as brought back to adoptable condition. Granted some of them have a few health issues that are more long-term, but those usually become permanent residents at the rescue facility. Everyone who has adopted horses from the rescue I work at has been beyond happy with their horses and the main reasons they've been returned is if they just didn't have money to keep any horses any more (not necessarily medical related)or they're moving away. Due to the fact that there are so many horses in this world, a great many end up as (example) wonderful family pets who just can't be kept do to the economy. All that to say, almost all horses at the rescue barns are left waiting for just the right person. So if you've read this article and now have second thoughts about adopting a rescue, please don't! Any horse may not work well with any person just because they aren't the right match. I agree that medically, a lot of rescues were discarded because of this and ended up there. But it's not like there's a fine line between broken-down, and flashy-but-flawed. There are so many horses in between. Anyways there's my 2 cents...
I run a horse rescue in Canada, outside Ottawa, and I would have to disagree with most of what has been said in this article.