18/06/2026
🐾 Habituation vs Sensitisation in Puppies. Why Understanding the Difference Matters 🐾
One of the most important aspects of raising a confident, emotionally stable puppy is understanding how they learn about the world around them. Two fundamental learning processes shape every experience a puppy has. They are habituation and sensitisation.
Although they sound similar, they produce completely opposite outcomes.
🧠 Habituation
Habituation is a simple form of learning where repeated exposure to a stimulus gradually leads to a reduced behavioural and physiological response.
In other words, the puppy learns that something is normal, predictable, and poses no threat.
A puppy who hears the washing machine, vacuum cleaner, traffic, or children playing every day, without anything unpleasant happening, will often stop paying attention to those sounds altogether. Their heart rate remains normal, stress hormones stay low, and they can relax despite the activity around them.
This is exactly what we want.
Habituation allows puppies to conserve mental energy by filtering out information that is irrelevant or harmless. It is one of the reasons well socialised dogs can calmly walk through busy environments without becoming overwhelmed.
🐶 Sensitisation
Sensitisation is the opposite process.
Instead of becoming less responsive, the puppy becomes increasingly reactive with each exposure.
A puppy who is frightened by thunder, startled by loud traffic, or overwhelmed by an uncontrolled encounter with another dog may respond more intensely the next time the same event occurs.
Rather than learning, "This is safe," they learn, "I need to be prepared because this is frightening."
This heightened responsiveness involves activation of the nervous system, particularly the sympathetic "fight or flight" response. Stress hormones such as cortisol can become elevated, making the puppy more vigilant and more likely to react strongly to future experiences.
Repeated sensitisation can contribute to long term fear, anxiety, noise phobias, and behavioural problems.
🌱 Why Early Experiences Matter
Between approximately 3 and 12 weeks of age, puppies pass through a critical period of behavioural development when the brain is exceptionally adaptable.
Neural connections are forming rapidly, and experiences during this time help determine what the puppy will consider safe, familiar, and normal throughout life.
However, more exposure is not always better.
The quality of an experience is far more important than the quantity.
Taking a young puppy to a crowded shopping centre, allowing dozens of strangers to handle them, or introducing them to overwhelming environments before they are emotionally ready can actually increase the risk of sensitisation.
Confidence is not created by flooding puppies with stimulation.
Confidence develops when puppies experience new things gradually, at their own pace, while remaining relaxed and feeling safe.
💡 The Goal
Successful socialisation is not about exposing puppies to everything imaginable.
It is about creating positive, calm, and controlled experiences that teach them:
✔ New things are safe.
✔ Novel experiences are enjoyable.
✔ The world is predictable.
✔ Recovery from mild stress is possible.
Every positive experience strengthens healthy neural pathways associated with confidence and resilience.
Every overwhelming experience has the potential to strengthen pathways associated with fear.
As breeders and owners, our role is not simply to introduce puppies to the world.
Our role is to ensure the world is introduced in a way their developing brain can process successfully.
Remember, it is not simply what a puppy experiences that shapes their future.
It is how they experience it.
You will find much more detailed information on puppy development, behaviour, learning theory, and raising resilient Border Collies by joining the Emerald Park Border Collies Education Platform.
Donna Williams,
Emerald Park Border Collies.
www.emeraldparkbc.com
