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Puppy Development Stages

The most important time in a puppy’s development is during the first year, especially during the first 4 months of life. By understanding the development stages, we can provide our puppies with what they need when they need it most, for optimal development! Please work hard during this 4 month period and will pay dividends for the rest of their life.


First 4 Months of Age

The Imprinting Period

Like children, puppies have a small window of time during brain development when they are most impressionable. This is called the imprinting, or critical learning period.  For puppies, the imprinting period is during the first 16 weeks of life. Puppies learn more during this time than they can learn in a life time. Remember the phrase, Everything I needed to know I learned in Kindergarten? Its the same for puppies. Therefore, the quality and quantity of what they experience will have a huge impact on their future personalities, and determine the formation of many of their behavior tendencies. In fact, such vast change in development happens with each day that passes, the Imprinting Period is further sub-divided into multiple distinct puppy-stages.  

First 8 Weeks

(1st Socialization Period)

In the first 8 weeks of life, puppies gain use of all the senses, become mobile, start growing baby teeth, transition to eating solid foods, and become completely weaned from their moms.

Learning is already rapidly occurring, making it important that human caretakers provide puppies with specific neurological stimulation, a complex environment, and careful, yet thorough, socialization for proper development and adjustment to living in the human environment/home.

During this time, there are also very critical lessons that the puppies must learn from their dog moms and siblings. Therefore, puppies should not be removed from their original homes before 8 weeks of age. 

Remember a Goldendoodle mom who is calm and confident will produce a puppy that is calm and confident. However, the Goldendoodle mom turns over her training to you at 8 weeks. You have to maintain the training process. Yes, you have a job to do if you want your puppy to turn into a calm and confident adult family member. This takes patience, time and consistent training. The rewards are huge, because your Goldendoodle puppy will give you far more than you can ever give him/her. Just ask any Goldendoodle owner who has an adult Goldendoodle. 


8–16 Weeks

(2nd Socialization Period) 

The optimal time for puppies to be placed with their new human families is at 8 weeks of age.  As soon as your puppy comes home, time is of the essence for you to provide a huge heaping of high quality socialization and schooling. This is the key to creating a socially self-confident, well-behaved puppy. It is also the key to preventing shy, and/or aggressive behaviors from developing later in life! 

Fear-Impact Period: During the 2nd Socialization Period, when your puppy is around 8-11 weeks of age, it is important to be aware of what is known as a Fear-Impact Period. If puppies have “bad” or scary experiences during this time, the impressions are likely to last a lifetime and resurface during maturity.  So, protect your puppy from these long-term effects by avoiding bad experiences.  Should your puppy become afraid for any reason, dangerous or not, immediately step in and remove him/her from the situation. Don't act like you are scared, just be disciplined and balanced. Don't encourage your puppy to be scared by petting and babying the puppy after a situation arises. Remember when you mom said, get up your OK? Feeling sorry for your puppy encourages long lasting fears. Of course its best practice to never let your puppy get in a bad situation. Puppies feed off of your personality. Practice good parenting!



4–6 Months

(Juvenile Period) 

During this time, your puppy will gain more energy, and become more “mouthy” and restless from the discomfort of teething as the baby teeth begin to fall out and the adult teeth erupt. This will typically occur between 4-6 months of age, but sometimes lasts longer.

Your puppy will also begin to acquire an adult coat and attain most of his/her height.  During this time, he/she will also become sexually mature.

2nd Fear-Impact Period: Starting in the 5th month of the Juvenile period, there may be a Second Fear-Impact Period that lasts for 3 weeks.  This is similar to the First Fear-Impact Period. If it does not occur at this time, it will occur later during the Adolescent Period.



6–12 Months

(Adolescent Period)

Hold on tight—your puppy will now be attaining full “puppy power” and will begin to test his/her wings! This is usually a difficult time for many puppy parents, but can be a mess for those with puppies that missed early establishment of boundaries, socialization and training.

Your puppy will be likely to have much more energy, spend more time exploring the environment, become easily distracted, and may even seem less interested in you and forgetful of his/her training skills.  Just be patient, consistent, and supportive—make sure boundaries are still well in place, review your training, and continue building on your successes.

2nd Fear-Impact Period (if has not yet occurred): Puppies that did not experience their Second Fear-Impact Period in the last stage of puppy-hood will experience it during the Adolescent Period. The Second Fear-Impact period is similar to the First Fear-Impact Period and lasts for approximately 3 weeks.


Your Goldendoodle puppy will continue to learn and grow just be patient, you are getting very close to having that perfect dog. Of course this will happen if you are committing the time to train and exercise your dog on a regular basis. Goldendoodles must have exercise during this period. Remember, nothing in life is free, and exercise is great for all of us!

1–4 Years of Age

(Maturity Period) 

I have found that a Goldendoodle puppy turns into an adult around 12 to 14 months old. At this point your Goldendoodle puppy will continue to learn and grow both mentally and socially. This is a time when you can look back and smile, and take a deep breath. Your Goldendoodle is at a great point, or you are getting very close. Each month, and each year your dog will continue to just get better and better. You will see your dog truly understanding your life, and is trying very hard to compliment his/her family. You will also understand why a service dog isn't fully trained until two to three years of age. 

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