Jack Hanna, the zoo director famous for making TV talk show appearances with live animals, has been diagnosed with dementia, his family said Wednesday.

Doctors think it is Alzheimer’s disease, the family said in a statement.

“His condition has progressed much faster in the last few months than any of us could have anticipated,” his daughters said.

“Sadly, Dad is no longer able to participate in public life as he used to, where people all over the world watched, learned and laughed alongside him,” they said.

Hanna, 74, known as Jungle Jack, was director of the Columbus Zoo and Aquarium in Ohio, where he remains director emeritus.

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