In 2003, Dr. Roger Mugford invented the “wag-o-meter” a device that claims to interpret a dog’s exact mood by measuring the wag of its tail. Did you know? The expression ‘Tail wagging the dog’ probably originated in the USA. There isn’t a specific incident that it refers to that can be located there but there are many instances of it in print in US publications from the 1870s onwards, whereas there are none that come from any other country until well into the 20th century. The earliest citation to be found is from The Daily Republican, April 1872 “Calling to mind Lord Dundreary’s conundrum, the Baltimore American thinks that for the Cincinnati Convention to control the Democratic party would be the …