That’s a tough call… It really depends on the grade/severity, what exact surgery, as there’s several different kinds depending on the severity. If it’s ‘just’ tie-back as in laryngoplasty, maybe… but it’s a big maybe. The management of these horses has to change completely and everyone has to be on board with that. My friend’s horse had tie-back in the early 2000s and you would be surprised how few barns want to accommodate a horse that has the surgery (meaning: food must be floor-fed, hay must be in a haybag hung low, etc). These are not special snowflake wants, they are legitimate, vet prescribed needs. My own vet thinks that any horse with any respiratory condition needing surgery needs to be out 24/7 and never in a dusky, dark barn again (he prefers they do the first month of stall rest either in a polebarn or in a medical paddock too!) - I don’t think he’s wrong, but it’s not a realistic management measure most barns can deliver.
As someone who has been involved in both the care immediately after the surgery and forward (though never owning a horse needing it) it is not something I would take on lightly. Especially not for resale. Now, if my own horse needed the surgery it would be done in a heartbeat, but he’s not exactly resale material at this point.
The layup portion can be really tough, depending on the management. I know for the horses I took care of, there were real concerns about infection and in one case, the horse developed a chronic cough and later, laryngeal collapse. It’s important that people recognize it is not a permanent solution - eventually you will have to do it again, IME. That and, there’s very little guarantee the surgery will be successful.
My personal experience, having dealt with many eventers that had the surgery, is that eventually they always need to step down – even if they’re doing real simple stuff that is no harder than a HJ round, like BN-N… I’ve also seen a surprising correlation between allergy intolerance with these horses, that may or may not be related … but every single horse I’ve taken care of with tie-back surgery has had a real problem with spring-time allergens to the point where they need to be kept in during the day… and, N=1 here, but I’ve only dealt with extreme allergies in horses that received some sort of surgery to correct a breathing issue.
And then there’s the thriftiness of them - all of the horses I took care of that had the surgery became hard keepers after – hard to keep a topline on them, very hard to condition them, hard to keep them going if they had time off… etc…etc… Several of them I knew well before their surgery and already had these issues. Of course, they still have some degree of exercise intolerance, and I’m not sure if that correlates into their condition… but I really think it does.
However, these were all really nice horses, and I can certainly understand the pull one would have to consider it.
That being said, I have come along with my trainers and others on shopping trips before, and most of them will not consider a horse with tie-back surgery for purchase – so from a resale perspective, it can be quite hard. One of the horses at the barn I managed is every AA’s dream horse - older tall, dark, handsome, quiet, sensible, kick&pull ride, 17hh ex-One Star hunk and we practically had to beat down doors to get people to look at him… IMHO it’s because we were very upfront in the ad about his condition… and it scared a lot of people away. He was a free lease off property or a part-lease on property - not like he was unsound, crazy, or expensive! I LOVED him and didn’t really want to see him go - other than his care (which was standard for a horse with tie-back) he was one of the easiest horses to handle and was always the first one to greet you (with a really muted, hoarse whistly throaty noise) in the morning.
But then there are the exceptions to my experience, which are many – and lots of TBs have tieback surgery and iMHO, some owners are none the wiser until they have to scope the horse and find out there’s already been a visit or two down there before…