Most of a dog’s personality is formed from birth to 1 year of age. When you bring your new puppy home, it is important to get it accustomed to different sites and sounds.
Slowly introduce it to the things in your household. If your puppy growls at an object or person, do not pick him up and cuddle him. This reaction will be rewarding to your puppy. It will teach him that the appropriate reaction to fear is to growl.
Growling can lead to biting. Instead tell him "No," show him the object and let him know there is nothing to be afraid of. Puppies like to play. They chew on everything including your fingers and legs - sometimes with a playful growl. Do not confuse this normal, natural behavior with the defensive growl of fear.
Take your puppy out often. Show him all kinds of sites, sounds, people and animals. Be careful when introducing your puppy to other dogs and animals. Know your dog's breed traits and use your best judgment. For instance, if you know your neighbor’s dog is dog-aggressive, take your puppy to the park instead to do your doggie socializing.
If you know your puppy’s breed has been known to kill cats, take extra precaution when cats are present. If there is a baby in the house, carefully let your puppy smell the baby. This will be the start of the bond between your new dog and your child. Teach your children to respect the puppy, and teach your puppy to respect your child. NEVER tolerate growling even with small dogs. Growling is a sign that your dog thinks he is Top Dog.
Three weeks to three months is the most critical age in socializing your puppy. This is when most of his personality is being formed. For this reason it is important to find a breeder who takes time to socialize their puppies.
Properly socializing your puppy will ensure the best traits come out in your
new pet.