Zoo animals behave differently than animals in the wild.

Both types are wild animals, however zoo animals get a meal or two per day with minimal effort required, so of course you’ll get a fat lazy tiger who does not particularly care to attack you.

Second point is that the tiger was raised by that zookeeper from birth, so yeah, the tiger trusts them, that does not mean that the tiger will trust you or anyone else like your neighbour’s pet dog does.

You absolutely can adopt a racoon baby and raise it into a racoon who will act like a pet cat towards you but bite all your visitors. Some people specifically get a wild animal pet for that reason.

Use the power of AI