AFTER You Get Your Puppy covers the last three developmental deadlines that your puppy needs to meet before he is five months old: 1. Your puppy should be socialized to a wide variety of people, especially children, men, and strangers, before he is twelve weeks old. 2. Your puppy must learn to inhibit the force of his bites and develop a "soft mouth" before he is eighteen weeks old. 3. You must prevent predictable adolescent problems. Veterinarian and animal behaviorist Dr. Ian Dunbar is the original creator of off-leash puppy classes, which sparked the revolution for positive, reward-based, dog-friendly dog training.