When a chick lays her eggs in Pluto’s doghouse, he returns just in time to see more than a dozen peeping chicks hatch in the Silly Symphony Mother Pluto, which peeped into theaters on this day in 1936. Despite his efforts to escape, the youngsters latch on to the hound, who soon finds a soft spot in his heart for each of them. This Silly Symphony is unique because it featured one of Disney’s established main characters. Although Pluto had been appearing in films since 1930, this marked the first time he was the star of the story. Just a year later, Pluto would be given his own series of theatrical cartoon shorts beginning with Pluto’s Quin-puplets.