I’m so sorry you’re going through this - I went through something really similar last year, except you were much smarter about the initial PPE/purchase process. To make a very long story short, I followed the advice of my vet, two trainers, and my gut: I euthanized. It was gut-wrenching and the single most difficult choice I’ve ever made after 30+ years in horses but it was without question, the right one. I did all the things people are suggesting: Vitamin E. Surrender to rescue (had a VERY tearful, very incredible conversation with a rescue owner who treated me with so much kindness and empathy I think she was an angel: she also suggested euthanizing). Broodmare (nobody felt she would even be able to handle insemination let alone live cover and some even suggested she’d get more violent if she had a foal). Cowboy. Natural horsemanship. Parelli. etc.
It finally took a good friend and well-respected horsewoman to put it this way: What if she’s with you so she doesn’t hurt anymore. Not necessarily physically, but mentally. What if she came to you so you could be the only brave one, the least arrogant one, the one who recognized that even with all the love and attention (and money, and supplements, and work…) there would always be a piece missing and that’s not fair. It’s not fair to the horse. Give her a calm, quiet, loving end.
So I did. I spent the night before feeding her as many treats as she would eat. Telling her that nobody would ever hurt her ever again (because someone clearly did) and that I was sorry. I hated every second of it, but it was without question, the right call.
The comment that owning a horse shouldn’t be like being in an abusive relationship is spot on. We spend too much money on this sport to have it be torture. The barn was my happy place for decades and then all of a sudden I was sobbing every time I went out because I wasn’t sure if I was going to get hurt or if something would set her off or if I would even be able to catch her.
I had a boarder confront me about the situation after the fact and what finally made me feel confident in my decision was before I could even open my mouth, the barn owner stepped in and said, with full force, “It takes a brave horsewoman to recognize that sometimes the most beautiful thing we can do for our horse is to let them leave a world they weren’t built for nor could they conform to. Adelaide36 is one of the strongest, smartest horsewomen in this barn and I suggest if you have a differing opinion you find another facility.”
The whole situation sucked. I wouldn’t wish it on my worst enemy. It almost got me out of horses for good after a 30+ year history with them. What makes it even more ironic is this horse was what I purchased after I lost my previous one to EDM (confirmed on necropsy).
But I know the horse is safe, she had a dignified, loving end to her life and she will never hurt anyone else nor will she ever be hurt.