Oh horses fart a lot too.

Horses poop a lot. A lot.

I had to search about and it's indeed a lot:

"it is quite normal for a horse to poo (defecate) 8-12 times a day and produce anywhere from 13 to 23 kilograms of poo a day."

Source: https://www.ranvet.com.au/horse-poo/

That's what you get when your primary source of nutrition is very calorie-poor and largely indigestible.

Yup. I’ve noticed that with my dog going to meat from kibble. Poop sizes reduced by 80%.

More than pooping a lot, they literally cannot hold it. Humans don't poop that much, but imagine if everyone just did it on the floor at a moment's notice regardless of where they are

So Red Dead Redemption 2 was actually realistic? I always wondered why the horses were pooping all the time. It's because of AI.