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.

How Big Do Border Collies Get? Average Growth and Weight Chart

Written by: Jeff Weishaupt

Last Updated on August 8, 2024 by Dogster Team

brown border collie dog lies in the autumn forest

How Big Do Border Collies Get? Average Growth and Weight Chart

Border Collies are medium-sized dogs originating from the border between Scotland and England. They’re known for their intelligence, agility, and energy, making them excellent working dogs.

On average, Border Collies reach their maximum height and weight at 1.5 to 2 years old. Males tend to be somewhat larger than females, standing at 19 to 22 inches and weighing 30 to 55 pounds. Females stand 18 to 21 inches tall and weigh 27 to 42 pounds.

These growth rates can vary between individual Border Collies. Their nutrition, exercise, and genetics can influence their growth and development. Keep reading to learn exactly how big Border Collies can get.

dogster paw divider

Border Collie Overview

border collie puppy lying on grass
Image Credit: stevelancaster, Pixabay

The Border Collie is an intelligent and energetic breed, first bred to herd sheep. They are medium-sized dogs with a lean build and coats in various colors and patterns. Border Collies have high energy levels, a great work ethic, and an eagerness to please.

Border Collies are descendants of Old Hemp, a sheepdog from England and Scotland. Old Hemp had exceptional herding abilities and worked as a stud to breed other sheepdogs. Other ancestors of this dog include the Bearded Collie, the Kelpie, and the Rough Collie.

As working dogs, Border Collies excel in agility, obedience, and herding trials. They thrive when given plenty of exercise and mental stimulation. So, they’re best suited for active owners who can give them plenty of opportunities to play.

In terms of temperament, Border Collies are friendly and loyal to their owners but can act reserved or even aloof around strangers. They’re good with children and other pets when socialized properly. Their strong herding instincts can make them prone to certain behaviors. That includes nipping, chasing, and herding, which can become problematic if ignored. Proper training and socialization are essential for raising a well-behaved Border Collie.

Border Collie Size and Growth Chart

This growth chart is specific to Border Collies. It includes the height and weight of Border Collies at different stages of their growth. We’ve specified a general range for both height and weight, as the growth of each individual dog can vary.

Growth charts can be useful for owners to track the growth of their Border Collie and ensure they’re developing at a healthy rate.

Age Male Height Range Male Weight Range Female Height Range Female Weight Range
1 month 8 to 10 inches 6 to 10 pounds 8 to 10 inches 6 to 10 pounds
3 months 14 to 16 inches 15 to 20 pounds 13 to 16 inches 13 to 18 pounds
6 months 18 to 20 inches 28 to 40 pounds 17 to 19 inches 23 to 35 pounds
9 months 19 to 22 inches 36 to 50 pounds 18 to 21 inches 30 to 42 pounds
1 year 19 to 22 inches 40 to 55 pounds 18 to 21 inches 30 to 50 pounds

When Does a Border Collie Stop Growing?

Border Collies reach their full height and weight by 12 to 15 months. Although, their bone density and muscle mass may continue to develop for a few more months. Most Border Collies will stop growing in height by the time they reach their first birthday. In rare cases, they may grow a little more in height until they are 18 months old.

Individual Border Collies may have slightly different growth rates. So, they may continue to gain muscle mass and fill out until they’re almost 2 years old. But their height is usually fully developed when they’re 12 to 18 months old.

Tracking your Border Collie’s growth during its first year is crucial. Rapid or stunted growth can point to underlying health issues or nutritional deficiencies. Consult your vet if you have concerns about your Border Collie’s growth.

border collie dog with toy ball on the couch
Image Credit: Julia Zavalishina, Shutterstock

Factors Affecting the Size of a Border Collie

Border Collies can grow up to 22 inches tall, but some individual dogs may be bigger or smaller than others. Malnutrition, lack of exercise, and faulty genetics can prevent a Border Collie from reaching its potential.

  • Genetics: A Border Collie’s size is largely determined by its genetics. The size of a puppy’s parents and ancestors can say how big it’s likely to grow.
  • Nutrition: Proper nutrition is essential for a Border Collie’s growth and development. Feeding your dog a balanced and nutritious diet can ensure they grow to their full potential. The diet must be appropriate for their age and activity level.
  • Exercise: Regular exercise is important for a Border Collie’s physical development. Puppies that get plenty of exercise during their growth period are likely to grow into strong and healthy adults.
  • Health: Various health issues can affect a Border Collie’s growth rate. That includes hormonal imbalances, malnutrition, or skeletal problems. Ensure your dog is up to date on its vaccinations, deworming, and vet checkups to identify issues affecting its growth.

Ideal Diet for Maintaining a Healthy Weight

The ideal diet for a Border Collie varies based on age, activity level, and body condition. Here are some general guidelines to help you create a balanced diet for your Border Collie:

  • Choose a high-quality dog food that meets the AAFCO standards for complete nutrition. Look for food appropriate for your dog’s age, size, and activity level.
  • Measure your dog’s food portions to avoid overfeeding. Make sure to research the appropriate amount for your dog’s weight and activity level.
  • Limit treats and table scraps. These can add up and contribute to excess weight gain.
  • Give your dog access to fresh water at all times. Proper hydration is important for maintaining a healthy weight.
  • Consider feeding your Border Collie several small meals throughout the day. This will help them regulate their appetite and avoid overeating.
  • If you’re concerned about your Border Collie’s weight, consult a vet to create the appropriate feeding plan.
  • Good protein sources for Border Collies include meat, fish, and eggs. Meanwhile, healthy fish oil and flaxseed fats can help keep their skin and coat healthy. Fruits and vegetables are other good sources of vitamins and minerals for your Border Collie.
Border collie holding food bowl
Image Credit: Emolaev Alexander, Shutterstock

How to Measure Your Border Collie

Measuring your dog during its growth period is important to ensure they’re developing normally. It can also help you watch their health and prevent obesity.

Here's a step-by-step guide on how to measure your Border Collie:
  • To measure your Border Collie’s height, place them on a level surface, such as a floor or a table.
  • Stand your Border Collie upright. Then, measure from the ground to its shoulder blades using a flexible tape measure. This measurement will give you the height of your Border Collie.
  • Use a digital scale designed for dogs to measure your Border Collie’s weight. Have your dog stand on the scale and record their weight. Or, if you don’t have access to this type of scale, measure your weight first and note it, then hold your dog and note that way. Find the difference between the two to determine your dog’s weight.

If you have difficulty measuring your Border Collie, consult a vet for guidance.

dogster paw divider

Final Thoughts

Border Collies are a medium-sized breed known for their herding abilities and athleticism. Like all dogs, they go through a growth period during the first year with major changes in height and weight. Owners can use a growth chart to ensure their dog is growing at a healthy rate.

Factors like genetics, nutrition, and exercise can affect the size of a Border Collie. So, you must provide a balanced diet, regular exercise, and adequate mental stimulation.

Understanding how big Border Collies get and what factors affect their size is important for anyone wanting to own this breed. With proper care and attention, you can help them reach their maximum physical potential.


Featured Image Credit: Julia Suhareva, Shutterstock

How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Dogster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

PangoVet Image Speak With A Vet Online

Get Dogster in your inbox!

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

Pangolia

© Pangolia Pte. Ltd. All rights reserved.