It is clear that making big decisions can be very challenging, especially when it comes to the life and death of our beloved pets. I am sorry to hear about your horse's health issues. As a horse owner myself, I can empathize with your situation. Have you considered using horse calming supplements to help your horse manage its health issues? There are many natural supplements available that can help reduce inflammation, ease anxiety, and improve overall health. I have found that using supplements has made a significant difference in my horse's quality of life. It might be worth considering as you navigate this difficult decision. Whatever you decide, I wish you and your horses all the best.