[Mr. Brightside]

An autopsy conducted by a zoo veterinarian on the Siberian tiger after police shot it to death showed that the animal had been "very determined to get out," Matthews said. Its claws were broken and splintered by clambering up the concrete moat wall, Matthews quoted the veterinarian as saying.

"This behavior may be consistent with a tiger that has been agitated and/or taunted," Matthews said.

So is the zoos policy is only to secure "non-agitated" animals?

[nicmarlo]

So is the zoos policy is only to secure "non-agitated" animals?

Yes. And to keep them restrained from "normal" people acting under "normal" circumstances at "normal" times of the day.