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Why is my border collie puppy so big?

Border collies are medium-sized sporting dogs. Although considering their size, we might expect them to live comfortably in an apartment. However, Border Collies have very high energy levels and need a lot of exercise and playtime on a daily basis. Therefore, this puppy will thrive in a more spacious home and with a family that can spend several hours a day for proper exercise.

We hope our Border Collie Size Guide has been a helpful resource in understanding the growth and size of this gorgeous pup. At the end of the day, it is important that you are fully prepared and know what to expect when you bring your new puppy home.

How to tell if your Border Collie is the right weight?

Charts and data aside, only you and your family know the unique characteristics of your own Border Collie. As a result, they may not quite follow a typical growth pattern, but this in itself can cause many owners to wonder if their Collie is a good weight.

The good news is that there is a very simple test you can do when it comes to reassuring yourself that your Collie is healthy.

From birth to 3 weeks of age (AKA neonatal period)

A newborn Border Collie has an average birth weight of 7-14 ounces. Within their first 24 hours, puppies can lose water weight.

After that, they should immediately gain weight.

Your border puppy should double its weight in its first week up to six weeks. At least ½ to 1 ½ ounces per day. Other milestones you don’t want to miss at this stage are their first crawl, opening their eyes, and teething.

How Big Do Female Border Collies Get?

Female border collies are usually slightly smaller than males, although this is not always the case. Female Border Collies usually reach a maximum size of between 16-20 inches, or 40-50 cm.

Male Border Collie

  • The average male border collie at 3 months of age will be between 6-7 kg (13-15 lbs).
  • The average male border collie at 6 months of age will be between 11-14 kg (24-30 lbs).
  • At one year of age, the average male border collie will weigh between 14-19 kg (30-41 lbs).

Border collies reach their average full adult weight and height by one year of age; some grow faster and reach mature weight and height as early as ten months but this is the exception rather than the norm.