Also known as "Miss Wayne", Pauline was not Taft's first presidential cow: she replaced the lesser-known "Mooly Wooly", which provided milk for the First Family for a year and a half before suddenly dying in 1910, reportedly after eating too many oats. Taft and his wife, Helen Herron Taft, had growing children, and Taft was a notoriously large eater; accordingly, Mooly Wooly was replaced by Pauline Wayne. Wisconsin senator Isaac Stephenson bought Pauline Wayne for Mrs. Taft. The four year-old cow was pregnant and gave birth to a male calf named "Big Bill" (after the President), which was later sent to a Maryland farm.
Pauline Wayne became a popular showpiece at the International Dairymen’s Exposition in Milwaukee in 1911. Pauline Wayne was being shipped to the show in a private train car that was attached to a whole train of cattle cars bound for the Chicago stock yards. The cow went missing for two days because a train switch crew had mistakenly switched Pauline’s car. The attendants who found Pauline Wayne convinced the stock yard that this was indeed the President’s cow, and she was saved "from the bludgeon of the slaughterer." .
From 1910 to 1913, Miss Wayne freely grazed the White House lawn. She was the last presidential cow to live at the White House and was considered as much a Taft family pet as she was livestock. When Taft left office, she was shipped to Wisconsin. Her Bovine Blue Book number was 115,580. The origin of the name "Pauline Wayne" is unknown; however, the New York Times noted that she was "a member of the great Wayne family of Holsteins."
- Powell, Mark J. (January 7, 2017). "The President's Cow Is Missing!". Retrieved November 21, 2017.
- Anthony, Carl Sferrazza (2005). Nellie Taft: The Unconventional First Lady of the Ragtime Era, pp. 239-40. Harper Collins. ISBN 0-06-051382-9.
- Pauline Wayne, President Taft’s Famous Cow
- "White House Cow Arrives. - Pauline Wayne, 3d, Comes Safely from Wisconsin - A Calf Expected" (PDF). The New York Times. November 4, 1910. Retrieved January 15, 2017.
- "Taft Cow on Retired List. - Pauline Wayne Goes Back to Her Old Wisconsin Farm" (PDF). The New York Times. February 2, 1913. Retrieved January 15, 2017.