How does the horse serve as a true friend and companion to Iona?

In Anton Chekhov's short story "The Complaints Book," the horse serves as a true friend and companion to Iona by providing him with solace and understanding in his loneliness. As Iona grApples with grief over his deceased son, the horse becomes a silent listener, absorbing Iona's sorrows without judgment. Their bond highlights the deep connection between humans and animals, showcasing how the horse offers Iona a sense of companionship in a world where he feels isolated. This relationship underscores themes of empathy and the need for companionship amidst personal suffering.