I agree that a WB isnât done growing at 3, but I also think that at age 3 you should have a decent idea of what you have. If sheâs 14 hands at 3, I think it is very safe to say sheâs going to be a very small horse. It would be great if she would stay a pony, but I donât think that is likely either. I do think there is some hope for improvement in type and shape, and I think most likely when she is done filling out her head will likely fit her body better. Keep in mind this is also a bad time of year to evaluate your young stock too closely with all the hair and mud going on.
No matter what she looks like, never underestimate the value of a good temperament. If she has a good attitude and sound legs, plus knowing that she is reasonably well bred, I think you can have some faith that she should be a very useful animal even if she isnât going to earn you any money.
On a practical level, I would get her going under saddle and plan to give her at least one more year to develop. I would plan to focus her program to capitalize on her good temperâtake her places, expose her to things, take her on trail rides, etc. so that when you do go to sell her she will appeal to a wider market. Unfortunately training is expensive even if sheâs not at a show barn, so if you arenât willing to make that investment, the other option is to get her started under saddle and then sell her inexpensively as a prospect. Definitely try to give her at least 6 more months before selling, though. Also, donât underestimate how much value a beautiful show level grooming/ trim job can add to a horse.
All breeders periodically take losses on horses that donât turn out as desired. I would be happy that she is kind and healthy and at least reasonable in her appearance and movement.
ETA, for what it is worth, Iâve had a couple of these small, late bloomers turn out to be really nice horses. Maybe not beauty queens, but handsome in their own way and with athletic potential that wasnât obvious until they were in work.