Pet Care Blog

Border Collie Growth & Weight Chart: Everything You Need To Know

Aliyah Diamond
Cornell University College of Veterinary Medicine
Border Collie dog

Bred initially near England and Scotland’s border, the Border Collie breed is a highly intelligent, energetic herding breed. However, their history is not limited only to their incredible sheep herding skills. These brilliant dogs have been featured in famous Scottish poetry, acted in tons of films and television shows, broken many world records, and were a favorite of Queen Victoria herself.

If you’re the pet parent to a sweet Border Collie pup, you may be asking yourself how large will my Border Collie grow and when will they stop growing?

Here's everything you need to know about Border Collie growth:

Border Collie Size Description

Border Collies are vibrant, medium-sized dogs. The largest male Border Collies are sometimes classified as large dogs due to their weight, which can fluctuate dramatically across the breed based on their gender as you'll see in the growth charts below.

Remember that the following numbers are estimates to give you an idea of how much your Border Collie may weigh at certain ages. If they’re a little ahead or behind the pack average, don’t be alarmed. Regular veterinary care will help ensure your dog is thriving.

Pro Tip: Did you know that you could be reimbursed for up to 90% of your dog’s vet expenses? Compare Border Collie health insurance options to see the savings.

Male Border Collie Growth and Weight Chart

Age Weight
1 mo. 3-5 lb.
2 mo. 5-10 lb.
3 mo. 10-15 lb.
4 mo. 13-18 lb.
5 mo. 17-22 lb.
6 mo. 20-25 lb.
7 mo. 23-28 lb.
8 mo. 28-33 lb.
9 mo. 30-35 lb.
10 mo. 30-40 lb.
11 mo. 35-40 lb.
12 mo. 35-45 lb.
2 yr. 40-55 lb.

Female Border Collie Growth and Weight Chart

Age Weight
1 mo. 2-4 lb.
2 mo. 4-8 lb.
3 mo. 8-12 lb.
4 mo. 11-16 lb.
5 mo. 15-20 lb.
6 mo. 18-22 lb.
7 mo. 20-25 lb.
8 mo. 23-28 lb.
9 mo. 25-30 lb.
10 mo. 28-32 lb.
11 mo. 30-40 lb.
12 mo. 30-45 lb.
2 yr. 30-45 lb.

How big should a 6-month-old Border Collie be?

Every puppy grows at a different rate, but you can expect most Border Collies to weigh more than 20 pounds at six months. Male Border Collies puppies will likely weigh between 20 and 25 pounds, while female will be between 18 and 22 pounds.

A full-grown Border Collie stands 18 to 22 inches tall, with male Border Collies being slightly taller than their female counterparts. Comparatively, a six-month-old Border Collie will still have a few more inches to grow to be at their full adult height.

Pro Tip: Download a new puppy checklist that covers essential tips for owners on their journey into pet parenthood.

Border Collie puppy (Image Source: Pexels)

At what age is a Border Collie fully grown?

Most Border Collies will stop growing around 15 months old. However, larger Border Collies may need up to 18 months to finish filling out their chest. The majority of Border Collies will be at their adult height at about a year old.

How much bigger will my Border Collie get?

One way to determine how much bigger they may get is age. Border Collies typically need 15 to 18 months to finish growing. If your Border Collie is younger than 12 months old, they definitely still have growing left to do! Check out our growth charts above for an estimated final size.

Another way is looking at your Border Collie’s paw size. If their paws are large compared to their legs and body, then they still have a lot of growing to do. Oversized paws are a classic adolescent feature showing they are still growing.

If you bought your Border Collie from a breeder, reach out to them for a specific, estimated weight based on your puppy’s parents and their past litters. Typically, a dog will not grow bigger than its largest parent, which will give you a maximum size estimate too.

What is the size of a full-grown Border Collie?

All Border Collies should weigh between 30 and 55 pounds. Adult female Border Collies typically weigh 30 to 45 pounds, while adult male Border Collies weigh between 40 to 55 pounds.

According to the American Kennel Club Official Border Collie Breed Standards, a mature Border Collie should stand between 19 and 22 inches tall (male) or 18 to 21 inches tall (female).

Two Border Collie dogs on a trail (Image Source: Pexels)

How do I make sure my Border Collie is healthy?

As purebred dogs, Border Collies are more prone to some genetic health problems. According to Village Veterinary Clinic, Border Collies are particularly prone to bone disorders, like osteochondritis dissecans, hip dysplasia, and epilepsy. Osteochondritis dissecans occurs when Border Collie puppies grow too quickly, and their joint cartilage does not properly connect to their bones. To avoid this, we recommend consulting with your veterinarian about the ideal diet to feed your Border Collie so that they grow at an appropriate speed without affecting their adult size.

Hip dysplasia can also occur if a puppy grows too quickly and can be identified with x-rays and a physical exam performed by your veterinarian. Surgery may be needed to treat both osteochondritis dissecans and hip dysplasia. Other conditions, like epilepsy, may require lifelong medication to treat.

Despite this, Border Collies can live long and healthy lives with proper veterinary care and health screenings. Remember that prevention is always better than treatment, and regular veterinary exams, x-rays, and vaccinations can help prevent and detect sickness early on.

Veterinary bills can quickly become expensive, with many surgeries and treatments costing thousands of dollars. When surveyed, four out of five pet parents said they’d be unable to pay a $5,000 vet bill out-of-pocket. This leaves many pet parents in a scary situation, where they would need to borrow or seek out financing options, should the worst happen to their beloved pet.

This is where pet insurance comes in. Pet insurance acts as a safety net by reimbursing you for up to 90% of your dog’s out-of-pocket veterinary expenses. Like us, our dogs are living longer lives and will require more veterinary care throughout their lifetime to live their healthiest lives. Pet insurance gives you peace of mind knowing that your pet will have access to top-notch veterinary care throughout their lifetime. Wellness plans are also available to help with regular veterinary costs, like exams, dental cleanings, and more!

Final Thoughts

Border Collies are energetic, affectionate dogs that give their all in everything they do. Don’t wait to set up a pet insurance plan to provide a safety net for your Border Collie best friend!

Having a pet insurance plan will give you peace of mind and your Border Collie puppy the care they deserve to live a long and happy life. Use Pawlicy Advisor today to compare the top Border Collie insurance plans side by side.

Pawlicy Advisor’s personalized recommendations can help you save up to 83% on insurance costs over your dog’s lifespan.

Key Takeaways

  • Border Collies weigh betweeen 30-55 pounds and stand 18-22 inches tall depending on the gender of the breed.
  • Due to certain hereditary dispositions, Border Collie growth can occur too quickly, so it's important to check in with your veterinarian on a routine basis.
  • Pet insurance can help owners save money on vet costs over the dog's lifespan to ensure they receive the essential care for a healthy, happy life.

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Aliyah Diamond

Aliyah Diamond
Cornell University College of Veterinary Medicine

Aliyah Diamond has more than ten years of experience in animal hospitals - working with dozens of species from dogs and cats, to elephants and snow leopards. Her lifelong passion for helping animals currently has her earning her doctorate of veterinary medicine at Cornell University and helping Pawlicy Advisor educate pet parents.

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