The problem is that a single unlocked door led to the unavoidable termination of these animals.
There were no attempts to lure them back to the enclosure (to which they would likely have returned due to the low temperature), no other attempts at capture, and no other plan than termination.
When escape of the enclosure is a lethal threat, then the enclosure needs greater protections to prevent mandatory termination. There should be at least three levels of containment, using doors with mechanisms that the animals cannot manipulate.
Facilities that cannot meet these containment standards should be forced to surrender them to those who can.
There were no attempts to lure them back to the enclosure (to which they would likely have returned due to the low temperature), no other attempts at capture, and no other plan than termination.
When escape of the enclosure is a lethal threat, then the enclosure needs greater protections to prevent mandatory termination. There should be at least three levels of containment, using doors with mechanisms that the animals cannot manipulate.
Facilities that cannot meet these containment standards should be forced to surrender them to those who can.