Amarte fue pecado

In the scene where Susan rides her birthday horse, Chulo, for the first time, there was a cameo by champion stud Captain Topper, a Shetland pony born in 1956. He was adjudged the greatest model stallion at the National Congress Pony Show in 1958 and 1959, and won 17 championships and 40 blue ribbons. Captain Topper was purchased for $6000 by Miss Patricia Burton of Detroit, who operated a stud farm on the Monterey peninsula.

At the Old Southern Pacific train station in Monterey, when Susan's train arrives from San Francisco, the train is going the wrong way (we see the northbound train to San Francisco, not the southbound train from San Francisco).

References Verano de amor (1959)