What do thoroughbred's eat?

Answer 1

Totally depends on what the horse is doing. A thoroughbred acting as a paddock buddy will probably eat only grass and hey, a racehorse would be fed hay and a specific type of grain. But in general they eat the same thing any horse would eat: hay, grass, grain, carrots, apples, etc.

Answer 2

Thoroughbreds eat the same thing as any other horse -- hay and grain, maybe some extra supplements -- but they generally eat a lot more than other breeds to to their higher activity level.