Wikipedia
Kholstomer
"Kholstomer", also translated as "Strider", is one of the most striking stories in Russian literature. It was started by Leo Tolstoy in 1863 and left unfinished until 1886, when it was reworked and published as "Kholstomer: The Story of a Horse". Georgi Tovstonogov staged it in his theatre in 1975. The horse was played by Evgeny Lebedev. This story prominently features the technique of defamiliarization by adopting the perspective of a horse to expose some of the irrationalities of human conventions.
Strider's altruistic life is recounted parallel to that of his selfish and useless owner. At the end of the story Strider dies but his corpse gives birth to a new life - that of wolf cubs: