It’s because they are desperate to grow strong once again and not remain useless.
I still use horses. It’s almost a must for anyone with corrupted builds just to get around.
Wow… thats just …wrong on so many levels. Unless you’re feeding your other thralls hay?.. 
Another weird bug.
I’d recommend feeding a horse bark from level 1-20. Then try to get high vitality perks or at least more grit. My horse has 3k hp and 670 armor and has survived a lot of punishment.
It is a problem from a long ago I think.
They even eat the meat you put into them.
Horses are on one of those fad primal diets
You got lucky with 3k regardless tho i was being sarcastic. In pvp horses are useless. “That’s what you get for complaining about horse meta” no we complained about a lance that could one shot not the horses health pool. So yea I’d like to see a big buff to their health
Herds of horses with shark teeth would be unstoppable, wtf we are lucky horses have those stupid flat human teeth.