这一天，快乐的猪小弟（梅尔·兰克 Mel Blanc 配音）迎来了他的生日。他和最爱的狗狗在家里布置好会场和蛋糕，并点燃了蜡烛。这时门铃响起，邮递员给他送来了一个包裹。有人给他送来可以随心所欲编制的桑蚕，他为此兴奋不已。眼看时间所剩无几，猪小弟和狗狗连忙梳洗打扮，结果小狗摄入太多酒精喝醉了。门铃声接连响起，企鹅和鸭子相继到来，猪小弟的无心之语，却让口袋里的桑蚕错领会了他的意思。猪小弟羞愧地将桑蚕扔进了蛋糕，结果惹出一连串的大乱子，不靠谱的鸭子和企鹅更是胡闹一番。

Porky's birthday. His uncle sends him a silkworm that churns out articles of clothing when it hears the word "sew." After a sock and a bra, Porky stuffs it in a pocket to prepare for his party. He uses some hair tonic, then his dog Black Fury has some for himself it's 99% alcohol. The guests arrive: a penguin and a goose. The penguin, shoveling in the food, accidentally swallows the worm, which starts churning out top hats, which pop open inside the penguin's head. The goose tries increasingly violent ways of remedying this. Meanwhile, Porky's dog, lathered with shaving cream, runs in and is branded a mad dog.