DALLAS (CBSDFW.COM) – The Dallas Zoo is conducting a necropsy to try to learn more about the death of its 1-year-old giraffe, Witten.

Witten died Monday while under anesthesia during a physical exam.  He stopped breathing.

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Witten the giraffe. (credit: Dallas Zoo)

The zoo said veterinarians tried to resuscitate him but were unable to.

Witten was getting prepared to move to a zoo in Canada, as part of a breeding recommendation from the Association of Zoos and Aquariums.

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Witten was named after Dallas Cowboys legendary tight end Jason Witten shortly after he announced his retirement from the NFL.

Jason Witten has since returned to play for the Cowboys.

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