Did Koreans used to feed their dogs in the morning or the evening?

 ANSWER: Probably in the evening.

개밥 means "dog (개) food (밥)," and a 바라기 is "a small porcelain food dish," so 개밥바라기 literally translates as "a small dog-food dish," but Koreans use the phrase to refer to the planet Venus. Why?

Venus can also be called either "the evening star" or "the morning star," depending on when it appears in the sky. In the early evening, it appears in the western sky and can then be called "the evening star." In the early morning, it appears in the eastern sky and can then be called "the morning star."

Koreans use 개밥바라기 to refer to Venus when it appears in the western sky in the early evening, so that suggests that Koreans normally used to feed their dogs in the evening, probably with food scraps collected throughout the day. Besides 개밥바라기, Koreans also refer to "the evening star" as 어둠별 (dark star), 태백성 (太白星), and 장경성 (長庚星).

The word that Koreans use to refer to Venus when it appears in the early morning sky is 샛별, which is probably an abbreviation of 새벽의 별 (morning star) since 샛바람 means "an easterly wind." Another name for "the morning star" is 계명성 (啓明星), which literally means "opening (啓) bright (明) star (星)," but since "bright star" (明星) is just another name for "morning star," it can literally translate as "opening morning star."