Do they eat grass............ get real.
You get real. Yes, they eat grass, but that's the least of it. What's the cost to allow them the acreage they need to survive? What's the cost of the fencing that keeps them out of the road? Whats the cost of their foot care that has to be done whether they work or not? What's the cost of the supplemental hay and grain almost all of them need to remain healthy and strong? What's the cost of their shots, wormer, medicines? Do you have any idea? I do. I keep horses.
Please, beyond the sea... I responded to your suggestion about ending horse racing by telling you it would be the worst thing you could do to the horses that are nurtured and survive because of it. I'm right, but you don't have to agree. I didn't answer for you, because I think you're a rather juvenile poster who spams the board with feel good nonsense. I answered so that other readers would see that such suggestions are not well thought out.
You're displaying your ignorance here. The ASPCA and animal cruelty folks spend a lot of time investigating and citing people who believe that horses can survive on grass.
They can't, not without thousands of acres to forage on, and even then many individual horses do not survive.