Zookeepers are expert at managing temperamental mammals. They face the risk of conflict and aggression every moment of their day. Here's how they manage it: 1. Don’t reward bad behavior. (Or else you’ll get more of it.) 2. Introductions take time. (Don’t expect instant acceptance.) 3. Enrichment always. (The mind needs stimulation.) 4. Good habits can replace bad habits. (The brain runs on habit.)