Where is the OCD located? If it is in the shoulder, that is generally a poor prognosis. In other joints, the prognosis varies but generally is excellent if the lesions are operated on early.
If the OCD is separate from the shoulder injury, I would be hopeful about the shoulder potentially continuing to heal and improve. Youngsters sometimes have incredible healing potential. At this point, at 14 months, the filly seems slightly young to operate on. At this age some OCD lesions may regress on their own. Generally we wait until 18 months to operate on any OCD lesions. There are some lesions that are obviously NOT going away, but a horse with one OCD could easily have a second or third, and you would want to get them all taken care of at the same time, and you wouldn’t want to operate on anything that was going to go away on its own.
My advice: get a full set of digital X-rays and consult with vets at a place that does a LOT of this stuff, not an ordinary equine vet hospital, but a place that deals with a ton of this stuff day in and day out. OCD surgery isn’t cheap, but it isn’t out of line with what you have invested in this youngster already. OCD surgery is not that big of a deal. Many young horses have it and go on and have excellent futures ahead of them. There is some layup involved, but nothing huge.
OCD can be genetic, but worse than that, just like beowulf, I hate to breed any horse that wasn’t sound enough to ever go to work at all. I wouldn’t consider 1 or two OCD lesions that didn’t interfere with a career under saddle to necessarily be a contraindication to using a horse as a broodmare, but at this point I don’t think it would be a good idea to sell the filly for breeding purposes.
The other option, of course, is to do nothing. In that instance I think you will end up stuck with a pasture ornament: a young horse that is permanently lame and can’t be ridden and shouldn’t be bred. If the OCD is already making her lame, I think it is unlikely to get better on its own. The cost of keeping a pasture ornament for a 25 year lifespan is considerably more expensive than OCD surgery. The last options would be euthanasia or giving the horse away to someone who was willing to invest in the OCD surgery and rehab.