Australian Shepherds and Border Collies are both popular dog breeds. They have some similarities and differences in size.
Are Australian Shepherds bigger than Border Collies? In short, Australian Shepherds are generally larger. They tend to have a sturdier build, while Border Collies are more agile. Both breeds are known for their intelligence and energy. Understanding their size differences can help you choose the right breed for your lifestyle.
This blog will explore the physical traits, temperament, and needs of each breed. We will help you decide which dog fits your family better. Whether you prefer a larger or more nimble dog, this guide will provide the necessary insights. Let’s delve into the world of these amazing dogs.

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Breed Overview
Australian Shepherds and Border Collies are popular herding breeds. Both are intelligent, energetic, and loyal. But are Australian Shepherds bigger than Border Collies? Let’s compare their traits to find out.
Australian Shepherd Traits
Australian Shepherds are medium-sized dogs. Males weigh between 50-65 pounds. Females weigh between 40-55 pounds. They stand 18-23 inches tall at the shoulder.
They have a double coat that can be straight or wavy. Common colors include blue merle, red merle, black, and red. They have strong herding instincts and need plenty of exercise. They are also known for their striking blue or multicolored eyes.
They are intelligent and trainable. Australian Shepherds excel in agility, obedience, and herding competitions. They are also loyal and protective of their families.
Border Collie Traits
Border Collies are also medium-sized dogs. Males weigh between 30-45 pounds. Females weigh between 27-42 pounds. They stand 18-22 inches tall at the shoulder.
They have a double coat that can be smooth or rough. Common colors include black and white, red and white, and tricolor. They are highly energetic and need lots of physical and mental stimulation. They are known for their intense stare, which they use to control livestock.
Border Collies are extremely intelligent and eager to work. They excel in herding, agility, and obedience trials. They are also very loyal and form strong bonds with their owners.

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Size And Weight
When choosing between an Australian Shepherd and a Border Collie, understanding their size and weight can help. Both breeds are similar, but there are key differences. Let’s explore their average height and typical weight.
Average Height
Australian Shepherds and Border Collies have similar heights. Here’s a breakdown:
Breed | Male Height | Female Height |
---|---|---|
Australian Shepherd | 20-23 inches | 18-21 inches |
Border Collie | 19-22 inches | 18-21 inches |
Typical Weight
Weight is another factor to consider. Here is the typical weight for both breeds:
Breed | Male Weight | Female Weight |
---|---|---|
Australian Shepherd | 50-65 pounds | 40-55 pounds |
Border Collie | 30-45 pounds | 27-42 pounds |
As you can see, Australian Shepherds are generally heavier than Border Collies. This is essential to know for grooming and feeding. Both breeds are active and need regular exercise. Choose the breed that fits your lifestyle and space.
Growth Patterns
Understanding the growth patterns of Australian Shepherds and Border Collies is essential for potential dog owners. Knowing how these breeds develop from puppies to full-grown adults can help in making informed decisions. Let’s dive into the growth stages of these two popular breeds.
Puppy Growth
Both Australian Shepherds and Border Collies start small, but their growth rates differ. Australian Shepherd puppies grow rapidly in the first six months. They can reach up to 50% of their adult size by this time. Border Collie puppies also grow quickly but tend to be slightly smaller in size during the early months.
Age (Months) | Australian Shepherd Weight (lbs) | Border Collie Weight (lbs) |
---|---|---|
3 | 15-25 | 10-20 |
6 | 30-45 | 20-35 |
9 | 40-55 | 25-40 |
Note that individual growth rates vary. Regular vet check-ups ensure healthy development.
Full-grown Size
As adults, Australian Shepherds are generally larger than Border Collies. Male Australian Shepherds typically weigh between 50-65 pounds and stand 20-23 inches tall. Female Australian Shepherds weigh slightly less, around 40-55 pounds, and stand 18-21 inches tall.
Male Border Collies weigh between 30-45 pounds and stand 19-22 inches tall. Female Border Collies weigh 27-42 pounds and stand 18-21 inches tall. This makes Australian Shepherds the bigger breed in most cases.
Here’s a quick comparison:
- Australian Shepherd (Male): 50-65 lbs, 20-23 inches tall
- Australian Shepherd (Female): 40-55 lbs, 18-21 inches tall
- Border Collie (Male): 30-45 lbs, 19-22 inches tall
- Border Collie (Female): 27-42 lbs, 18-21 inches tall
Both breeds are active and agile. Size differences do not affect their energy levels or intelligence. They are both excellent companions and working dogs.

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Physical Build
Understanding the physical build of Australian Shepherds and Border Collies can help in deciding which breed suits your lifestyle. Both breeds are energetic and agile, but they have differences in muscle mass and bone structure. These differences impact their abilities and overall appearance.
Muscle Mass
Australian Shepherds usually have more muscle mass compared to Border Collies. Their muscular build gives them strength for herding livestock. They look more robust and sturdy. Border Collies, on the other hand, are leaner. Their muscles are less pronounced but they are built for speed and agility. This makes them excellent at quick movements and sharp turns.
Bone Structure
The bone structure of Australian Shepherds is generally heavier. They have strong, thick bones that support their muscular frame. This gives them a solid appearance. Border Collies have lighter bones. Their bone structure supports their lean build. This makes them look more delicate but does not compromise their strength. Their lighter bones contribute to their agility and quickness.
Gender Differences
Understanding the gender differences in size between Australian Shepherds and Border Collies is important. Males and females of both breeds can vary significantly in size. This can impact their suitability for certain roles or lifestyles.
Male Size
Male Australian Shepherds are generally larger than their Border Collie counterparts. On average, a male Australian Shepherd weighs between 50 to 65 pounds and stands about 20 to 23 inches tall. In contrast, male Border Collies are slightly smaller, weighing around 30 to 45 pounds and standing approximately 19 to 22 inches tall.
Breed | Weight (lbs) | Height (inches) |
---|---|---|
Australian Shepherd | 50-65 | 20-23 |
Border Collie | 30-45 | 19-22 |
Female Size
Female Australian Shepherds also tend to be larger than female Border Collies. Typically, a female Australian Shepherd weighs between 40 to 55 pounds and stands about 18 to 21 inches tall. On the other hand, female Border Collies weigh around 27 to 42 pounds and have a height of approximately 18 to 21 inches.
Breed | Weight (lbs) | Height (inches) |
---|---|---|
Australian Shepherd | 40-55 | 18-21 |
Border Collie | 27-42 | 18-21 |
Genetic Factors
When comparing the size of Australian Shepherds and Border Collies, genetic factors play a significant role. These factors influence their physical traits, including size. Let’s delve into the genetics that impact these two beloved breeds.
Inherited Traits
Inherited traits are passed down from parent dogs to their puppies. These traits include size, coat type, and temperament. For Australian Shepherds and Border Collies, their ancestry determines their physical characteristics.
Australian Shepherds often inherit genes that make them slightly larger. They have a more robust build. Border Collies, on the other hand, are bred for agility. This makes them leaner and sometimes smaller.
Breed-specific Genes
Breed-specific genes are unique to each breed. These genes dictate certain physical and behavioral traits. In Australian Shepherds, these genes can lead to a more muscular frame.
Border Collies’ genes contribute to their agility and speed. They are often slimmer and lighter. This difference in genes accounts for their size variation.
The table below summarizes the key size differences:
Breed | Average Height (inches) | Average Weight (pounds) |
---|---|---|
Australian Shepherd | 18-23 | 40-65 |
Border Collie | 18-22 | 30-45 |
Understanding these genetic factors helps explain why Australian Shepherds are generally bigger than Border Collies.
Diet And Nutrition
Proper diet and nutrition play a vital role in determining the size and health of both Australian Shepherds and Border Collies. While these two breeds may share some similarities, their nutritional needs can differ, impacting their overall growth and well-being.
Impact On Size
The diet of a dog directly affects its size and weight. Australian Shepherds and Border Collies have different growth patterns. Australian Shepherds tend to be larger and more muscular. Border Collies are leaner and more agile. High-quality protein is crucial for muscle development. Both breeds need balanced diets for optimal growth.
Recommended Diet
A well-balanced diet includes proteins, fats, carbohydrates, vitamins, and minerals. Here is a simple table for comparison:
Component | Australian Shepherd | Border Collie |
---|---|---|
Protein | 25-30% | 20-25% |
Fats | 15-20% | 10-15% |
Carbohydrates | 30-35% | 35-40% |
Vitamins and Minerals | Essential | Essential |
Both breeds require high-quality food for optimal health. Here are some recommendations:
- Lean meats like chicken, turkey, and fish.
- Whole grains such as brown rice and oats.
- Fruits and vegetables for essential vitamins.
- Healthy fats from sources like fish oil.
Portion control is critical. Overfeeding can lead to obesity. Consult your vet for specific dietary needs.
Exercise And Activity
Australian Shepherds and Border Collies are active breeds. Their exercise and activity needs shape their growth and overall health. Understanding their requirements ensures they stay fit and happy.
Exercise Needs
Both Australian Shepherds and Border Collies need regular exercise. They are energetic dogs and require mental stimulation too. Without enough activity, they can become bored or destructive.
Breed | Exercise Needs |
---|---|
Australian Shepherd | At least 1-2 hours daily |
Border Collie | At least 1-2 hours daily |
Both breeds enjoy activities like running, hiking, and playing fetch. Mental challenges like puzzle toys or training sessions can keep their minds sharp.
Effect On Growth
Regular exercise impacts the growth of these dogs. It helps maintain a healthy weight and muscle tone. Proper activity levels can prevent joint issues and other health problems.
Lack of exercise can lead to obesity, which strains their joints. This can affect their growth and overall health. Ensuring they get the right amount of activity is key to their well-being.
In summary, both Australian Shepherds and Border Collies need a lot of exercise. Keeping them active ensures they grow healthy and strong. Regular exercise benefits their bodies and minds.
Frequently Asked Questions
Are Australian Shepherds Bigger Than Border Collies?
Australian Shepherds are generally slightly larger than Border Collies. Aussies typically weigh between 40-65 pounds. Border Collies usually weigh between 30-55 pounds.
What Is The Size Difference Between These Breeds?
Australian Shepherds are usually larger than Border Collies. Aussies can be 18-23 inches tall. Border Collies range from 18-22 inches.
Which Breed Has A More Muscular Build?
Australian Shepherds tend to have a more muscular build compared to Border Collies. Aussies have a robust and sturdy frame.
Do Border Collies Have A Longer Lifespan?
Border Collies generally have a longer lifespan. They often live 12-15 years. Australian Shepherds typically live 12-14 years.
Conclusion
Australian Shepherds and Border Collies have unique traits. Size varies between them. Both breeds are active and intelligent. Choose based on your lifestyle. Consider their needs and energy levels. Each dog has its own charm. Research to find the best fit.
Enjoy your journey with your new furry friend!