Puppies grow quickly during their first months of life, but the speed of growth varies by breed, expected adult size, genetics, and age.
Small-breed puppies generally reach adult size sooner, while large-breed puppies can keep growing for much longer. Growth is also usually faster during early puppyhood and gradually slows as a puppy approaches its adult size.
A puppy’s growth speed is best understood by tracking changes in weight and body size over time, rather than expecting the same weekly gain throughout puppyhood.
When Do Puppies Grow The Fastest?
Puppies usually experience their fastest physical growth during early puppyhood.
During this period, weight can increase noticeably over relatively short periods. As the puppy gets older, the rate of weight gain generally slows as it gets closer to its mature size.
The exact timing depends on the puppy’s breed and expected adult size.
A small dog may reach most of its adult size much earlier than a large dog. Large-breed puppies can continue growing well after smaller breeds have reached maturity.
The Puppy Growth Stages guide provides more information about how puppy development changes across different stages.
How Much Do Puppies Grow Each Week?
There is no single weekly growth rate that applies to every puppy.
Weekly weight gain depends on:
- Age
- Breed
- Current weight
- Expected adult size
- Genetics
- Individual growth pattern
- Nutrition
A young large-breed puppy may gain several pounds in a period when a small-breed puppy gains much less.
This is why weekly growth should be compared with the puppy’s own previous measurements and an appropriate breed or size reference.
The Puppy Weight Chart can provide a broader reference for puppy weight at different ages.
Does Puppy Growth Slow Down With Age?
Yes. Growth generally slows as puppies approach their adult size.
A puppy may gain weight rapidly during its early months and then experience smaller increases later. The puppy may continue developing physically even when changes on the scale become less dramatic.
This is one reason a puppy’s growth should be considered across several measurements.
The Puppy Weight By Age resource can help you understand how puppy weight changes as age increases.
How Fast Do Small-Breed Puppies Grow?
Small-breed puppies usually grow rapidly during their early months and reach adult size earlier than larger dogs.
Their period of major weight gain is relatively short compared with large-breed puppies.
Because they reach maturity sooner, the amount of growth remaining after the early puppy months can be smaller.
Examples of small breeds can include dogs such as Chihuahuas, Yorkshire Terriers, and other toy or small breeds.
The exact growth pattern still varies between individual puppies.
How Fast Do Large-Breed Puppies Grow?
Large-breed puppies can experience substantial growth during their first year and may continue developing after smaller dogs have reached adult size.
Their growth involves changes in both body weight and skeletal development.
Large puppies therefore need to be evaluated according to their expected adult size rather than compared with small-breed growth rates.
Breed-specific resources such as the Labrador Retriever and German Shepherd Puppy Weight & Growth guides provide more relevant information for these breeds.
How Does Breed Affect Puppy Growth Speed?
Breed is one of the main factors affecting how quickly a puppy grows.
Two puppies of the same age can have very different growth rates because they may have different expected adult sizes.
For example, a French Bulldog puppy and a German Shepherd puppy do not follow the same growth pattern even when they are the same age.
Breed-specific growth information can therefore provide more useful context than comparing a puppy with a general average.
You can also review the Golden Retriever Puppy Weight & Growth, French Bulldog Puppy Weight, Poodle Puppy Weight & Growth, and Cavapoo Puppy Weight resources for breed-specific growth information.
How Can You Measure Puppy Growth Speed?
The simplest approach is to record your puppy’s weight at regular intervals.
For each measurement, record:
- Date
- Age
- Weight
- Breed or expected adult size
For example:
| Age | Weight |
|---|---|
| 10 weeks | 12 lb |
| 12 weeks | 15 lb |
| 14 weeks | 18 lb |
This puppy gained 3 pounds between each measurement in this example.
A longer series of measurements can show whether growth is continuing, slowing, or changing.
The Puppy Growth Tracker can be used to keep these measurements organized.
Why Is My Puppy Growing Faster Than Another Puppy?
Puppies of the same age can grow at different rates.
Differences can come from breed, genetics, sex, expected adult size, and individual development.
Even puppies from the same litter may not gain weight at exactly the same rate.
Comparing two puppies directly can therefore give a misleading impression of whether one puppy is growing normally.
Your puppy’s own growth history and an appropriate size or breed reference provide better context.
How Does Current Weight Help Measure Growth?
Current weight gives you one point on your puppy’s growth pattern.
When combined with previous measurements, it shows how much the puppy has changed over a specific period.
For example, if a puppy weighs 10 pounds at 10 weeks and 14 pounds at 14 weeks, the puppy has gained 4 pounds during those four weeks.
You can use the Puppy Weight Calculator to check current weight information and then compare it with previous measurements.
Does Height Grow At The Same Speed As Weight?
Weight and height do not always change at exactly the same rate.
A puppy can become taller while changes in body weight occur at a different pace. As puppies mature, their body proportions can also change.
This means growth should not be judged from weight alone when assessing overall physical development.
Age, breed, body condition, and the puppy’s general development all provide additional context.
How Long Do Puppies Keep Growing?
The length of the growth period depends largely on adult size.
Small dogs generally reach adult size sooner. Medium-sized dogs take longer, while large and giant breeds can continue growing for an extended period.
Some physical development can continue after a puppy has reached most of its adult height or weight.
The When Do Puppies Stop Growing? guide explains the different growth timelines in more detail.
How Fast Do Puppies Reach Their Adult Weight?
Puppies do not reach their adult weight at the same age.
A small breed may approach its adult weight much earlier than a large breed. The amount of weight still to gain also depends on the puppy’s current age and size.
The Puppy Adult Weight resource can help estimate expected adult size from current puppy information.
For a broader question about future size, see How Big Will My Puppy Get?.
What If My Puppy Is Growing Slowly?
A slower growth rate does not automatically mean there is a problem.
Growth naturally changes as puppies age, and individual puppies can have different growth patterns.
Look at the puppy’s weight over several measurements rather than relying on one reading.
If a puppy consistently fails to gain weight, loses weight, has a significant change in appetite, or develops other concerning signs, veterinary advice is appropriate.
For more information about low or absent weight gain, see Why Is My Puppy Not Gaining Weight?.
How To Track Puppy Growth Over Time
Consistent tracking makes changes easier to understand.
Use the same scale when possible and record the puppy’s age and weight each time.
A simple record might look like:
Age → Weight → Change Since Previous Measurement
You can then compare the measurements with an appropriate growth chart or breed-specific resource.
The Puppy Growth Chart can provide another reference for understanding how growth changes with age.
How Fast Do Puppies Grow In Their First Year?
The first year contains a large portion of a dog’s physical growth, but the speed changes throughout that period.
Early growth is generally faster. Later growth becomes slower as the puppy approaches adult size.
The exact timeline depends on the dog’s expected adult size.
A small breed may be close to adult size during the first year, while a large breed can still have additional physical development after the first birthday.
Key Takeaway
Puppies grow fastest during their early months, but growth speed varies by breed, age, genetics, and expected adult size.
Small breeds usually reach maturity sooner, while large breeds can continue growing for longer. Weekly weight gain also changes as puppies approach adult size.
The best way to understand your puppy’s growth speed is to track weight consistently and compare the trend with an appropriate age, size, or breed reference.