For many animals in captivity, things really are changing. The Buenos Aires Zoo recently announced that it would release many of its 2,500 animals to wildlife reserves and convert the 140-year-old institution to a park focusing on education.
But for Arturo, who arrived at the Mendoza Zoo when he was just 8 years old, after being born and spending his early life in captivity in the United States, change just didn't happen fast enough.
"I think it's a tragic situation, and I hope that we can put an end to keeping these animals in environments that aren't good for them," MacKay said.
"You are free now, Arturo," the Facebook page wrote.