好的，這是一個搞笑的英文故事：
有一天，一隻小鳥飛到一棟房子的屋頂上。它看到房子裡有一隻大貓和一隻小貓，於是它決定與它們交朋友。它開始與大貓和小貓一起玩耍和聊天。小鳥問大貓：“你為什麼這么胖？”大貓回答說：“因為我每天都吃很多食物。”接著，小鳥問小貓：“你為什麼這么瘦？”小貓回答說：“因為我每天都去外面跑步。”小鳥想了想，覺得自己應該減肥，於是它決定每天去跑步。但是，它跑得太快了，結果它飛到了天空中，變成了一隻風箏！大貓和小貓看到這一幕，都笑了起來。
故事翻譯成英文就是：
One day, a little bird flew to the roof of a house. When it saw the big cat and the kitten inside the house, it decided to make friends with them. It started playing and chatting with the big cat and kitten. The bird asked the big cat, "Why are you so fat?" The big cat replied, "Because I eat a lot of food every day." Then, the bird asked the kitten, "Why are you so thin?" The kitten replied, "Because I go out running every day." The bird thought for a while and decided to lose weight, so it decided to go running every day. However, it ran too fast and ended up flying into the sky as a kite! The big cat and kitten saw this and all laughed.
希望這個故事能給你帶來快樂！