I'm not going to kill a baby horse and why does my horse have to be registered? The stallion is registered, I already know that and why can't I breed a rescue?
Can you post pics of the mare and tell us as much as you think you know about her breeding? Also give some pics of the stallion and a link to his pedigree?
Anyone who has a stallion on their place can have an OOPS. It's not great and not something to try for but ........it happens. It happened to me. I had a 2 year old filly, not an age I would EVER condone breeding, and my stallion get together because of an accident with an older broodmare. We loaded up the broodie and hauled A$$ to the vet to have her put down and someone, no fingers pointed, left a gate or 2 open. The stallion bred the filly and was back in his pasture before we got home. Never even occurred to me that the breeding had happened. The barn helper found the gates open and closed them and never thought to mention it to me. Come Feb of last year, Mare 1 foals out as scheduled, Mare 2 foals out as scheduled and when we came home from having the newest foal checked out from the vet, I saw a white thing out in the pasture. Went out to see who had been throwing plastic bags around in the pasture and found.....a placenta and....a still wet filly. Fortunately that 2 year old was a great mother. I had bought her to breed to that stallion, but discovered personality and temper flaws that had caused me to put her up for sale, not one I wanted as a breeder. Her filly, that I would have flushed had I had even an inkling that the breeding had occurred, turned out to be the 1 of the 3 that I liked the most and she didn't have any of her mother's character flaws. Go figure! So, I double registered her and sold her as a yearling to a great home.
I got very lucky. There were all kinds of pitfalls with that breeding because of the mare's age and her temper and the plain fact that she had a few screws loose. She was gorgeous and double registered, but I had decided back when SHE was a yearling that she didn't fit my breeding plans because I breed for conformation and temperament before anything else.
So, I'm the last person to get on your case about an accidental breeding! Not going to hear it from me, but what I would like to do is find out as much as possible about the 2 horses involved, so that I could maybe give you some good direction.