" So he said to young Sam: "if you lose your cow you should report this to the Watch under Demonic & Farmyard Animals (Lost) Act of 1804. They will swing into action with keenness and speed. Your cow will be found. If it has been impersonating other animals, it may be arrested. If you are a stupid person, do not look for your cow yourself. Never try to milk a chicken. It hardly ever works. "

― Terry Pratchett , Where's My Cow? (Discworld, #34.5)