When my big guy was 4 and we found his neck issues I was scared he would be a Wobbler based on how fast he showed pain. My PPE vet (out of state) was stunned when my vet called to consult with him. We imaged as well as we could without myelogram. I wasn’t going to put him through that unless it would have been for insurance with the intention of not waking him up from anesthesia.
CSU looked at his measurements and images closely and felt he had less than 50% chance of spinal cord compression, and we went with sports medicine therapies which did help. But of course I was a wreck during that time, having had the horse only a few months and thinking I’d have to put him down. Not that he had a very easy life after that.
I have to say that the fear I saw in my client’s horse when he started to become neurologic periodically was very upsetting. He’s the one I mentioned with the same kind of issues with the farrier. He was a pretty advanced beginner safe horse, totally willing to please. And he would just start bolting and get wide eyed and panic about what appeared to be nothing. The switch would flip on and off for a while before he started to show deficits all the time. He didn’t live near me at the end, but I know his retirement wasn’t the smoothest or very long.
And the most horrible thing I have witnessed is my friend’s horse with shivers who went from schooling for a dressage show one morning to not able to use his hind end that afternoon. I came out after work to see a horse who had been struggling for a long time and the fire department was there trying to hoist him up with the vets medicating him to see if they could get him to stand. He was exhausted and beat up and he could not use his hind legs at all. They had to pull the metal fence of his run out of the ground to get the trucks to him. My horse was his friend and stared and watched the whole thing out of his window while everyone else got distracted with hay.
Those are the kinds of images you can’t forget, and it’s just horrible for everyone, human and horse. One of my biggest fears was losing my own horse in similar fashion if his neck got too bad. He did not have a kind passing either with the colic, but at least I didn’t have to guess at when it would be the right time.
You are doing the right thing. It’s horrible, and I’m very sad for both of you, but have no regrets for doing it before you discover something catastrophic.