The unnamed cubs are the first of their species to be born at the zoo.

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DENVER – Twin clouded leopard cubs are being hand-raised by zookeepers at Denver Zoo.

The cubs, a boy and a girl, were born on March 14 at the zoo. They were removed from the care of mom, Lisu, just hours after they were born because she was not tending to them, according to the Denver Zoo.

"Zookeepers believe this is because first time mother Lisu was hand-raised herself and lacks the experience to rear her own cubs," Denver Zoo said in a press release.

The unnamed cubs are being given food and medicine every three hours by zookeepers for now. Denver Zoo says they are doing well.

They are not on public display and will remain behind-the-scenes until they are a little older.

This is the first birth of their species at the zoo. Their father, Taji, is also a first time father.

Even though leopard is in their name, according to the zoo, they are not actually a leopard species.

According to the zoo, "They are considered a 'bridge' between typical big cats, like lions and tigers, and the small cats, like pumas, lynx and ocelots."

(KUSA-TV © 2014 Multimedia Holdings Corporation)

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