(KYTX) - The two male lions are no longer on exhibit at the Dallas Zoo.
They have been out of the public's eye since one of them attacked and killed a female.
Caldwell Zoo lion keepers say the situation in Dallas is tragic and rare, especially because the lions involved all grew up together.
The lion relationships at Caldwell are different, because the lions are not related. That's why Caldwell keeps its male lions separate, so they don't get territorial.
"Wild animals like this, they're very unpredictable and you just never know. You don't know what the animal is thinking or what causes him to make the next move. so we have to deal with a lot of this stuff from watching from the outside," says Caldwell zookeeper, Scotty Stainback.
Scotty Stainback with Caldwell says Dallas zookeeper's didn't do anything wrong. He says once the Dallas investigation is over he will try to learn from what happened. There is no word yet when the male lions will be back on display.