It seems intuitive that punishing an animal that’s behaving badly will make the bad behavior stop. Here’s why that’s not true.
The behavioral concept of dominance was, for a time, misinterpreted as a motivation for dog behavior. Here’s what’s wrong with that notion.
Without a proper foundation, no puppy can grow into a healthy dog. Proper socialization is just as important as good nutrition and veterinary care to your growing puppy. Here’s why.
From about 3 weeks to about 3 months of age, puppies are primed for bonding to other animals and individuals, for learning that objects, people, and environments are safe, and for learning what the body cues and signals of others mean. It is their sensitive period for socialization and it is the most important socialization period in a dog’s life. Puppies who do not get adequate socialization during this period tend to be fearful of unfamiliar people, or dogs, or sounds, objects and environments.
— Dr. Sophia Yin

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The Vaccination Vs Socialization Debate

This means that breeders, new puppy owners, veterinarians, trainers and behaviorists have a responsibility to assist in providing these learning/socialization experiences with other puppies/dogs, with children/adults and with various environmental situations during this optimal period from birth to 16 weeks.
— Veterinary behaviorist R.K. Anderson DVM, Diplomate ACVB and ACVPM, Professor and Director Emeritus, Animal Behavior Clinic and Center to Study Human/Animal Relationships and Environments, University of Minnesota
There are only five steps on the road to potty training success. What are you waiting for? Start your dog off on the right paw today, and you’ll be well on your way to a clean house and a well trained dog!
— Dogster.com
Just because an animal is misbehaving (behaving in an undesirable behavior to us) does not mean the misbehavior is motivated by a desire to have high rank. In general animals perform behaviors because the behaviors have been rewarded. So to decrease the undesirable behavior we have to remove the rewards for undesirable behavior and instead reward alternate desirable behaviors.
— Dr. Sophia Yin