I would not put it in the ad, but would disclose in on first contact if the buyer sounds suitable/interested. The reason I would not put it in the ad, is that the potential buyer may not want the bone spur to be public knowledge, and by disclosing it in an email or over the phone, you are better able to provide more info on the details of the bone spur.
I would tend to put it in the ad as an explanation for the horse's price. A well-done ad with a horse listed at a price well below what a 100% sound/no bone spur horse should be would leave me questioning what's wrong and if I should even call. Having the reason for the lower price explained in the ad would make me decide whether or not it was worth checking out instead of ruling out the horse due to the story sounding too good to be true.
Originally Posted by Silverbridge
If you get anything on your Facebook feed about who is going to the Olympics in 2012 or guessing the outcome of Bush v Gore please start threads about those, too.
IMO, I would disclose it in the ad. You would be saving yourself, and others, lots of time that could potentially be wasted by explaining the fact this horse has a bone spur.
Regardless if it hasn't caused lameness, the fact remains that bone spurs are developed as the horse's way of stabilizing a joint that has become susceptible to developing arthritis. You would disclose a horse that has arthritis if you were selling him correct? I would look at this the same way.