Platero y yo
After a long period of absence, living in large and anonymous cities, a poet, Juan, returns to the village of his birth, Moguer, there he finds happiness through; the friendship of a small donkey, Platero, a free spirited girl, Aguedilla, and recalling memories of his childhood.
Starring Simon Martin, María Cuadra, José Calvo, Carlos Casaravilla, Antonio Prieto, Elisa Ramírez, Roberto Camardiel, María Francés, Mercedes Barranco
Watch "Platero y yo" on FlixOlè released in 1966. It's a drama movie, and has a rating of 6.2 out of 10 from Imdb which is usually fine for this kind of movie.