BonniDune Kennel is located in
Southern Indiana, USA. Although I started
with German Shepherd Dogs, today BonniDune is
dedicated to showing, trialing and producing
sound, versatile Border Collies.
BonniDune is proud to be recognized as an AKC Breeder of Merit.

Puppies Born December 25, 2013

What Size Dog Door For A Border Collie


When it comes to choosing a dog door for your beloved Border Collie, it is essential to consider their size and needs. Border Collies are medium-sized dogs known for their intelligence and energy. They require regular exercise and mental stimulation, making a dog door a convenient way for them to access the outdoors independently. To ensure the comfort and safety of your Border Collie, it is crucial to select the right size dog door for them.

Measuring Your Border Collie

Before purchasing a dog door, it is important to measure your Border Collie to determine the appropriate size. Here are the steps to measure your dog:

  1. Measure the height of your Border Collie from the floor to the top of their shoulders. This measurement will help determine the height of the dog door opening.
  2. Measure the width of your Border Collie at the widest point, typically the chest or shoulders. This measurement will determine the width of the dog door opening.

Choosing the Right Size Dog Door

Based on the measurements you have taken, you can now select the appropriate size dog door for your Border Collie. Here are some general guidelines:

  • For the height of the dog door opening, add 2 inches to your Border Collie’s shoulder height. This extra space allows for easy access and prevents any discomfort or injuries.
  • For the width of the dog door opening, add 2 inches to your Border Collie’s width measurement. This additional width allows for a comfortable passage through the door.

Remember that Border Collies come in various sizes, so it is crucial to measure your specific dog to ensure a perfect fit.

Consideration for Growth

If you have a Border Collie puppy, it is important to consider their potential growth when choosing a dog door size. Puppies grow quickly, and investing in a larger size dog door can save you from having to replace it as they mature. Look for dog doors with adjustable flaps or panels that can accommodate your puppy’s growth.

Installation and Training

Once you have chosen the right size dog door, follow the manufacturer’s instructions for installation. It is important to properly train your Border Collie to use the dog door. Start by holding the door open and encouraging your dog to walk through. Gradually, they will learn to use it independently. Positive reinforcement, such as treats and praise, can be helpful during the training process.


Providing your Border Collie with a dog door allows them the freedom to go in and out as they please, promoting their well-being and happiness. By measuring your dog accurately and choosing the right size dog door, you can ensure a comfortable and safe access point for your Border Collie to enjoy the great outdoors.

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