Border Collie Growth Timeline: When Will Your Puppy Reach Full Size?

By PetWah 6 Min Read
6 Min Read

If you’re a proud owner of a Border Collie puppy, you’re probably eager to know when your furry friend will reach their full size. Every dog breed has a unique growth timeline, and Border Collies are no exception. Knowing when your pup will reach full size can help you plan their diet, exercise routine, and even their living space. In this blog post, we’ll take a closer look at the Border Collie growth timeline and answer the question that’s on every owner’s mind: when will your Border Collie puppy reach full size? Let’s dive in!

Border Collie Growth Timeline: When Will Your Puppy Reach Full Size?

Border Collies are an incredibly intelligent and highly trainable breed. They also happen to be one of the most popular dog breeds in the United States. If you’re considering bringing a Border Collie puppy into your home, one of the questions you may be wondering is, When will my Border Collie reach full size? In this blog post, we’ll explore the Border Collie growth timeline and give you a better idea of when your furry friend will be fully grown.

Birth to Four Weeks

At birth, Border Collie puppies weigh between 8 and 14 ounces. They are born with their eyes and ears closed and are completely reliant on their mother for nourishment and care. During this time, their primary focus is on growth and development. They spend most of their time sleeping and nursing.

Around two weeks old, their eyes and ears begin to open, and they start to become more aware of their surroundings. By four weeks old, they are starting to become more active and will begin to explore their immediate surroundings. However, they are still quite small and not yet fully mobile.

Four to Eight Weeks

Between four and eight weeks old, Border Collie puppies start to become more independent. They will begin to play with their littermates and explore their environment more fully. During this time, they will also start to eat solid food and drink water. They will also receive their first round of vaccinations and be dewormed.

At eight weeks old, most Border Collie puppies are ready to leave their mothers and go to their new homes. At this point, they will weigh between 5 and 10 pounds on average.

Border Collie Growth Timeline: When Will Your Puppy Reach Full Size?

Eight Weeks to Six Months

During this time, Border Collie puppies experience a lot of growth and development. They will continue to gain weight and grow in height. By six months old, most Border Collies will be close to their adult height, but they will still have some filling out to do. At this point, they will weigh between 20 and 30 pounds on average.

Six Months to One Year

Between six months and one year old, Border Collie puppies will continue to fill out and gain muscle mass. They will also start to lose some of their puppy coat and grow their adult coat. By one year old, most Border Collies will be at their full height and weight. On average, they will weigh between 30 and 45 pounds and stand between 18 and 22 inches tall at the shoulder.

One Year and Beyond

While Border Collies will reach their full size by one year old, they will continue to mature and develop mentally and emotionally. They will also continue to gain muscle mass and improve their athletic abilities. By two years old, most Border Collies will have reached their full physical and mental maturity.


Border Collies are a wonderful breed that can bring a lot of joy and companionship into your life. While they may take a bit longer to reach full size than some other breeds, they are well worth the wait. By understanding the Border Collie growth timeline, you can better prepare yourself for the journey ahead and ensure that your furry friend is happy and healthy at every stage of their development.

In conclusion, Border Collies are known for their intelligence, agility, and loyalty. As puppies, they go through an exciting growth process that can be both challenging and rewarding for their owners. Understanding the timeline of their growth and development is crucial to their overall health and well-being. By providing them with proper nutrition, exercise, and care, you can help them reach their full potential and enjoy a long and healthy life together. So, if you are planning to bring home a Border Collie puppy, be prepared to invest time, effort, and love into their growth and development, and you will be rewarded with a faithful and loving companion for many years to come.

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By PetWah
We at PetWah adore pets and want to give them the finest goodies they’ve ever had. We understand the significance of knowing what to feed your pets and what not to feed them.
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