This is not the same as taking your puppy to a music festival or the bar and just exposing him to new things. Formulas such as “100 new people in 100 days” are well-meaning and might be right for some dogs. However, for a shy puppy, meeting that many people could backfire. It’s not enough to just expose your puppy to new things - you’ve got to make it positive.
Some pet parents still decide to enroll their pet in socialization classes once they're at-home obedience training is completed. Classes meant specifically for puppies often enroll dogs between the ages of eight to ten weeks old to five months old. These types of classes let dogs practice the good behavior techniques you've taught them at home with other adults and puppies. Early socialization with humans and other dogs will help your pup learn what's acceptable in the wider world outside your own backyard.
Aggressive behavior is the most common reason that people seek professional training for their dogs. Aggressive dogs require careful evaluation from a professional to accurately classify and diagnose the behavior. Puppies that display aggressive behavior are often diagnosed as undersocialized or hyperactive, and may evolve out of that behavior with regular obedience training. However, dogs with real aggression issues require specialized training from a behaviorist or trainer who understands genetic and hereditary factors, types of aggression, environmental factors and aggressive treatment methods. The number one suggestion when seeking an aggressive behavior specialist is to ask a trusted veterinarian. Dog rescues or other professionals may also have good referrals.
Changing behavior takes time. You need to have realistic expectations about changing your dog’s behavior as well as how long it will take to change behaviors that you don’t like. Often behaviors which are “normal” doggie behaviors will take the most time such as barking, digging and jumping. You also need to consider how long your dog has rehearsed the behavior. For example, if you didn’t mind that your dog jumped up on people to say hi for the last seven years and now you decide that you don’t want him to do that anymore, that behavior will take a much longer time to undo than if you had addressed it when he was a pup. Remember it’s never too late to change the behavior some will just take longer than others.