Once KS is clinically diagnosable (remodeling on x-ray) there is no way to reverse it. I’m skeptic of the claims (especially in that FB group) of ‘reversing’ KS. If there is radiographic findings such as changes to the joint[s] and spaces, those are there to stay. You can address symptomatic presence, but you will never reverse the remodeling.
Make sure that you take multiple x-rays of the spine. The way the horse is standing can change views, so it’s best (imo) to have a very experienced vet take the x-rays, and also consider having different vets take them (ie at a clinic) at different points in the horse’s career. Having a yearly x-ray baseline isn’t a bad idea, to track remodeling.
The FB group is a good resource for general knowledge. This will come across as overly myopic but, keep the success of those posts with a big grain of salt. Many members of that group do not have a good eye for soundness.
There is no one size fits all treatment for KS. Some need surgery. Some need management changes. About all of them do benefit from 24/7 turnout, though.
I’ve posted a lot about my KS journey with my current horse. I did not do the bone shave surgery; I really feel, after watching friends go through this with their personal horses, that this is additional trauma on an already painful site – and I haven’t seen long term (3+ year) success from it. The horses still look as lame to me before surgery as they do after. Some people report success and that is great for them.
What has worked best for my current KS horse is 24/7 turnout, ruthlessly staying on top of his hoof angles, and yearly meso. He will never be 100% happy in his body, but he is servicably sound with these therapies, and my vet feels his workload is appropriate. I can’t help but wonder what he would be like without the KS; he is such a generous horse, so I watch him like a hawk to know when and if it is time to back off.
I do expect as he gets older, that he will need more assistance in other areas of his body like his hocks and neck. KS does profoundly affect these areas.