when do rough collies reach full size?

when do rough collies reach full size?

Rough Collies are a popular breed of dog known for their intelligence, loyalty, and elegant appearance.

But just how big do they get? When do Rough Collies reach full size?

Growth and Development

Growth Stages

1. Birth to 8 weeks

Puppies are born blind, deaf, and completely dependent on their mother. During this period, puppies absorb the sights, sounds, and smells of their new home environment.

It is important to provide a safe and comfortable space for them to explore.

2. 8 to 12 weeks

At 8 to 12 weeks old, the rough collie will be almost full-size. While it may seem like they are done growing at this point in time, their coat and body structure will continue to develop over the next few months as they reach adulthood.

3. 12 to 16 weeks

At 12 to 16 weeks old, a rough collie will reach its full size. While puppies may continue to grow steadily in height until they are around 18 months old, their weight will remain relatively stable during the 12 to 16-week period.

During this time frame, it is important that owners provide their puppy with appropriate nutrition and exercise in order for it to reach its full-size potential.

A rough collie’s diet should include a variety of proteins, carbohydrates, and fats in order to meet the dog’s energy needs during this important growth period.

4. 16 to 24 weeks

At 16 to 24 weeks, your Rough Collie will have reached their full size. At this point, they should weigh anywhere between 30 and 55 pounds depending on the sex of the dog.

Male Rough Collies may be larger than females. It is important to monitor their growth throughout this period and make sure that they are eating a nutritious, balanced diet.

If they seem to be growing too fast or too slow, contact your veterinarian to ensure that everything is okay.

5. 24 weeks and beyond

At the 24-week mark, most rough collies reach their full size and weight. While they may still develop more muscle mass and fill out a bit more, the growth rate slows significantly at this point.

From here on out, your pup will be reaching its adult size and shape! During this time, it is important to continue providing healthy nutrition and exercise to ensure your pup continues to grow properly.

Once they reach full size, they may still continue to gain a bit of weight as they age. As with any breed, if you notice any sudden changes in weight or appetite then it is best to consult with your veterinarian for advice.

Additionally, regular annual checkups can help ensure your pup is healthy and developing correctly.

With proper care, a rough collie will live an average of 12-15 years.

This time allows for plenty of opportunities for fun and plays with your four-legged family member!

rough collie weight chart by age

Stage of Life Weight Range (Male) Weight Range (Female)
Puppyhood 1-10 pounds 1-10 pounds
Adolescence 10-40 pounds 10-30 pounds
Adulthood 65-75 pounds 50-65 pounds
Seniorhood 60-85 pounds 45-60 pounds



How big will my Rough Collie get?

Rough Collies reach their full size when they are between 12 and 15 months of age. However, it is important to note that Rough Collies may continue to gain weight and fill out as they mature up until about 18 months.

After this point, the Rough Collie should be considered fully grown. It is also worth noting that males grow larger than females, typically reaching heights of up to 24 inches.

Females reach a slightly smaller height of 22 inches on average.

At what age do Rough Collies get their full coat?

Rough Collies typically reach full size and growth when they are between 12-15 months old.

However, their coat may continue to grow and thicken until they are 18 months or older.

At this age, the adult coat of a Rough Collie is fully developed with all its layers: an undercoat for insulation, a middle layer for warmth, and a top coat to protect against rain and dirt.

The adult coat of the Rough Collie is usually at its fullest and most beautiful from 18-24 months old when the fur is luxuriously thick and glossy.

After 24 months, the coat may start to thin out slightly but will still remain dense, full, and thick overall.

How much should a 7 month old Rough Collie weigh?

At around seven months of age, Rough Collies typically weigh anywhere from 25 to 50 pounds.

However, this is just a rough estimate and individual dogs may vary in size. It’s important to note that they are still growing at this age, so their weight will continue to increase until they reach full maturity, typically between 18 and 24 months.

A full-grown Rough Collie can weigh anywhere from 45 to 75 pounds. Therefore, it’s important to ensure that a puppy Rough Collie is fed properly and receives adequate exercise in order to reach its maximum potential size and weight.

How long does it take for a collie to be fully grown?

On average, a Rough Collie will reach a full size between 1 and 2 years of age. Size can vary depending on the dog’s breed and gender, however; males tend to be larger than females.


Rough Collies usually reach full size by the time they are 12-14 months old. However, some may develop more slowly and not reach their full adult size until 18 months.

It is important to feed them a balanced diet during this growth period so that they can have healthy bones and tissues.

Regular exercise will also help your Rough Collie reach their optimal size. With the right care and nutrition, your Rough Collie will be a healthy and happy adult!

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