Swedish zoo shoots escaped chimps

[Catherine]

The chimps would have returned to their enclosure when they were ready to eat and sleep. They were just having fun exploring.
Zoos need to rethink how they deal with animals getting loose.

If they have the right equipment and someone skilled enough, they do not need to get close to the animal to sedate it.
Researchers tranquilize polar bears safely from a distance in the wild, so they can study them. 

They could have thrown the chimps a treat with a sedative in it and they would have eaten it. Why are they not prepared to do something like that.