 Rama and Tusko were both euthanized in 2015, leaving Packy to be the sole elephant with tuberculosis at the zoo.Treatment was stopped in 2016 after the regimen was found to be ineffective in treating his disease.Packy had long been the subject of the campaign of the animal welfare groups In Defense of Animals and Free the Oregon Zoo Elephants, who maintain claims that the living conditions in the Oregon Zoo for the elephant herd are insufficient, and demand their release to a sanctuary.