[1] In 1953, she married for a second time to John Rupert Hunt Thouron, a native of Cookham in Berkshire, England.
In 1967, she received an Honorary Doctorate in Humane Letters from the University of Pennsylvania in recognition of her work.
Esther du Pont and her husband owned a large estate near Unionville, Chester County, Pennsylvania they called "Doe Run."
Esther du Pont Thouron helped build the clinic and hospital at the University of Pennsylvania School of Veterinary Medicine's New Bolton Center.
Esther du Pont Thouron died at her winter home in Florida on March 24, 1984, at age 76.