What always goes to bed with its shoes on?

Why this works

This riddle plays on the double meaning of "shoes." While we typically think of shoes as something humans wear on their feet, in the context of horses, "shoes" refers to horseshoes—metal coverings nailed to their hooves for protection. So, the clever twist is that a horse literally goes to bed (or rests) with its horseshoes on, making it a fun and unexpected answer!