Dogster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

3-Month-Old Puppy: Vet Approved Guide of What to Expect

Written by: Genevieve Dugal

Last Updated on May 20, 2024 by Dogster Team

3 months old goldendoodle puppy running outdoor

3-Month-Old Puppy: Vet Approved Guide of What to Expect


Dr. Chyrle Bonk Photo


Dr. Chyrle Bonk

DVM (Veterinarian)

The information is current and up-to-date in accordance with the latest veterinarian research.

Learn more »

Welcoming a new puppy into your home can be an overwhelming experience. At 3 months old, your fluffy bundle of joy is at a crucial stage in their development, and as a new owner, you may not know how to care for them to ensure that they become a well-rounded adult dog. But don’t worry—we’ve got you covered with this guide.

Read on as we explore what you should expect at this age, so you can navigate this phase of puppyhood in the best possible way!

dogster paw divider


A 3-month-old puppy’s behavior is characterized by nipping and chewing, sudden bursts of energy followed by almost comatose naps, plenty of curiosity and exploration, and of course, mischief!

At this stage, you can also expect them to start teething, which explains their obsession with chewing everything that comes their way. Biting is how puppies may communicate and express their desire to play, but it is essential to discourage this behavior. Otherwise, you may face more severe problems once they reach adult size.

Start socializing and training your puppy as early as possible, but keep in mind that their attention span is short at this age. So, keep training sessions brief, and focus on basic commands for now, like “sit,” “give paw,” and “lie down.”

Portrait of a black and tan miniature pinscher puppy
Image Credit: e-Kis, Shutterstock

dogster paw divider

Puppy Food Basics

During this stage, choosing a high-quality, nutritionally balanced puppy food is critical to support their rapid growth and development. Look for options with essential nutrients like protein, fat, calcium, digestible carbohydrates, and omega-3 fatty acids like docosahexaenoic acid for bone health and brain development.

Feeding Schedule

Typically, by 3 months of age, your puppy will need three to four meals per day. During this time, your puppy could start to lose their chubby belly. Keep puppy-sized portions while their bodies grow. Don’t hesitate to talk with your vet to determine the best feeding plan based on the breed and size of your tiny four-legged companion.

Maltipoo puppy eats from a metal bowl
Image Credit: marketlan, Shutterstock

Breed-Specific Growth

Different breeds grow at different rates, so understanding your puppy’s breed characteristics will help you monitor their weight and growth rate. Large breeds may generally experience a more prolonged growth period, with a few continuing to grow for up to 2 years, while smaller breeds will grow more slowly and generally stop between 6-12 months of age.

Weight Monitoring

Regularly monitor your puppy’s weight to ensure that they are growing at a healthy pace. Consult your vet if you have concerns about your puppy’s growth or if you are unsure about their ideal weight range.

dogster paw divider


It’s best to start training your puppy as early as possible. This way, you can begin to socialize them, prevent any behavior issues before they occur, and teach them basic commands.

Using treats is an excellent way to train your puppy and reinforce positive behaviors. Be sure to choose treats that are appropriate for their size and age, and keep in mind their overall calorie intake. Overfeeding can lead to weight issues, so strike a balance between treats and regular meals.

Crate Training

Crate training is a positive way to create a safe and secure space for your puppy. It aids in housebreaking and provides your puppy with a sense of security. Introduce the crate gradually, using positive reinforcement to associate it with comfort and relaxation.

You can make your puppy’s crate extra cozy without breaking the bank. There’s no need to buy a fancy dog bed, as all the chewing is likely to ruin it, anyway. Instead, place down a few soft, cheap blankets for a cozy spot. Toss in a few puppy-friendly toys, and you’re all set! If possible, keep the crate in your bedroom so your pup feels close to their new family.

a miniature dachshund puppy inside a crate
Image Credit: Jaclyn Vernace, Shutterstock

dogster paw divider


As you might expect, a 3-month-old puppy is bursting with playful energy. The best way to get them to use up their energy without harming the development of their bones is to aim for one or two short walks of about 5 minutes for each month of their age (so, currently, about 15 minutes). Don’t overdo it, and avoid jogging with your little one for now, as the impact of running or too much exercise could lead to injury and improper development.


Properly socializing your puppy during this critical phase of their development will have a positive impact on their long-term behavior. Therefore, do not neglect this essential step in their transformation into a confident, happy, and balanced adult dog. Introduce your puppy to new people, animals, objects, places, and other unfamiliar things, but always do it gradually so as not to frighten them. Joining puppy classes is another fun way to strengthen their social skills—and yours too! Just be sure to only associate with dogs that aren’t showing signs of illness and that have been vaccinated.

Welsh corgi pembroke puppies in a cage
Image Credit: Evgeniy Kurt, Shutterstock

Sleep Requirements

Puppies need plenty of sleep to support their growth and development. At 3 months old, your puppy may sleep up to 20 hours per day! Ensure that they have a comfortable and quiet place to rest, and establish a consistent bedtime routine to promote healthy sleep habits.

Here are tips that can help make your puppy sleep more soundly:
  • Respect your puppy’s sleep by avoiding disturbances when they’re resting. While cuddling is tempting, refrain from letting them rely on you to fall asleep. Keep an eye on them, as they’ll likely need to go outside once they wake up.
  • Teach your puppy where to sleep by guiding them to a designated spot like a crate or dog bed. Encourage napping in a quiet area, helping them learn that it’s their dedicated sleep space.
  • Establish a routine that balances play and rest, ensuring that your puppy gets enough sleep.
  • Be aware of signs of tiredness to prevent overstimulation, and guide them to their sleeping area to wind down.


Grooming your 3-month-old puppy involves gentle brushing to prevent tangling, using a puppy-friendly shampoo for a bath about once a month, and occasionally trimming their tiny nails. You can also introduce them to cleaning their ears with a damp cotton pad and brushing their teeth. If your puppy has long hair, you can take them to a professional dog groomer for a whole new experience.

Once your puppy is 3 months old, it’s time to start using shampoo and conditioner. Make sure to choose products that are designed for dogs and that are pH balanced. If you’re in a hurry or your pup seems too reluctant to get in the water, consider using dog wipes.

puppy getting a bath
Image Credit: Dikushin Dmitry, Shutterstock

dogster paw divider


During this stage, your puppy’s vaccine schedule is ongoing. While it’s great to let them explore, ensure safe interactions with familiar vaccinated pets to reduce disease risks. Make sure you’re taking your pup in for regular veterinary visits, which likely won’t be a problem if you’re on a proper vaccination schedule. Your vet will be able to make recommendations on diets, treats, and other essentials and make sure they are growing and developing as they should.

Vaccines and Boosters

Your puppy will visit the vet frequently for vaccines, as puppies require multiple boosters. The distemper combination series usually starts between 6 and 8 weeks and ends around 12-16 weeks with rabies available after 12 weeks of age. Talk to your vet about non-core vaccines (such as Lyme disease, leptospirosis, and canine influenza) based on your puppy’s lifestyle and local disease prevalence.

dogster paw divider

Final Thoughts

Adopting a new puppy is a unique experience that is not without its challenges. Like most babies, 3-month-old puppies can be particularly intense during this phase of their development, alternating between exuberant energy, restful naps, frequent feeding, nipping, and chewing on everything. But when you know what to expect, navigating and appreciating this short period of your new fluffy treasure’s life becomes more manageable. Make sure to cherish every precious moment with your little one, as they grow up way too fast!

Featured Image Credit: anetapics, Shutterstock

Get Dogster in your inbox!

Stay informed! Get tips and exclusive deals.
Dogster Editors Choice Badge
Shopping Cart


© Pangolia Pte. Ltd. All rights reserved.