Selling: You have no control over what happens to the horse, but no responsibility either, and you can move onto other horses without the financial burden of that one. You have to cut your ties to the horse.
Donating: Who would you donate her to? I think this has the same caveats as selling, as you lose control over the horse's fate.
Retiring: Great, that is if you can afford two. Not so great if you can't and you're stuck with a horse you don't want to ride.
Leasing: It gives a lot of the responsibilities of horse ownership to someone else, while you retain the final say over anything that happens to it. That can be the downside too. I've seen owners end up in a tight spot when they've leased a horse out with the view that someone else would pay for it for a while, but then the leaser ended the lease for whatever reason, and the owner was stuck with a horse they couldn't afford or didn't want to deal with. They probably should have sold it in the first place, but couldn't bear to part with the horse 100%. That's understandable, but if this is you, you need to be prepared to assume responsibility for the horse at a moment's notice.
Breeding: Breeding a horse because it has a uterus and you don't know what else to do with it is a terrible reason to breed. I recall you saying that your horse is fairly young and already has arthritis. This does not make her a good broodmare prospect, as those are not genes that you want passed on. She'd really have to be an outstanding example of her breed in order to make the risks and expenses worth it. Not even Uthopia could sire a great dressage horse without a quality dam. You could easily end up with two horses who aren't what you want.
Last edited by thesilverspear; 07-06-2014 at 08:16 AM.