Early Neurological Stimulation: What It Is and Why Breeders Use It
Early Neurological Stimulation: What It Is and Why Breeders Use It
At Big Hearted Breeders, everything we do is built on science, compassion, and experience. From the very first days of a puppy’s life, our goal is to give each one the best possible start, not just physically, but mentally and emotionally. One of the most important tools we use to achieve that is a proven technique called Early Neurological Stimulation (ENS).
So what exactly is Early Neurological Stimulation, and why do ethical breeders like us make it a core part of our program? Let’s break down what it is, how it works, and why it makes such a lifelong difference.
What Is Early Neurological Stimulation?
Early Neurological Stimulation (ENS) is a series of gentle exercises designed to stimulate a young puppy’s developing nervous system during a critical window of growth, between day 3 and day 16 after birth. This period is when a puppy’s brain and central nervous system are rapidly developing and are especially responsive to mild, positive stress.
ENS was first developed by the U.S. Military’s “Bio Sensor Program”, later known as the Super Dog Program, which aimed to improve the performance of working and service dogs. Research found that short, controlled neurological stimulation during this early period led to stronger, more resilient, and adaptable dogs.
The Five ENS Exercises
Each day during the ENS window, every puppy at Big Hearted Breeders is handled individually and guided through five gentle exercises:
- Tactile Stimulation: We gently tickle the puppy’s toes with a cotton swab for a few seconds to activate their sense of touch.
- Head Held Upright: We carefully hold the puppy in a vertical position, head pointing upward, to lightly challenge balance and blood flow.
- Head Pointed Down: The puppy is briefly inverted with its head pointing downward.
- Supine Position: We cradle the puppy on its back in our hands for a few seconds, helping it get comfortable in a position of vulnerability.
- Thermal Stimulation: We place the puppy briefly on a cool, damp towel to introduce mild temperature variation.
Each exercise lasts about 3–5 seconds and is done only once per day. The entire session takes less than a minute, but its impact lasts a lifetime.
Why We Use Early Neurological Stimulation

At Big Hearted Breeders, our commitment to responsible and ethical breeding extends beyond health testing and socialization. We believe ENS gives our puppies a crucial advantage in their emotional and physical development.
According to research conducted by Dr. Carmen Battaglia, dogs exposed to Early Neurological Stimulation show measurable long-term benefits, including:
- Stronger heart rates and heartbeats
- Improved stress tolerance and recovery
- Enhanced immune system function
- Greater adaptability to new environments
- Improved learning and problem-solving abilities
These advantages translate directly into the kind of family companions we aim to raise: confident, calm, and resilient puppies who adapt smoothly to new homes, people, and experiences.
How ENS Fits Into Our Broader Puppy Development Program
ENS is just one piece of the developmental puzzle at Big Hearted Breeders. We combine it with early scent introduction (ESI), daily handling, sound desensitization, and positive reinforcement to build confident, well-balanced puppies.
We begin positive reinforcement training early, using gentle exposure, encouragement, and rewards to shape curiosity rather than fear. ENS lays the neurological groundwork for that learning by strengthening the brain’s stress response system. In short, it helps puppies handle life’s challenges with confidence.
This approach aligns with what modern canine behaviorists emphasize: the more positive experiences and gentle challenges a puppy encounters in early life, the more capable and emotionally stable they will become as adults.

Why Ethical Breeders Embrace ENS
Unfortunately, not every breeder takes the time or care to incorporate ENS. It requires daily, hands-on interaction, scientific understanding, and a deep respect for a puppy’s limits. But ethical breeders like us see it as non-negotiable.
ENS is more than a trend; it’s evidence-based puppy rearing. Studies continue to confirm that mild, early stimulation improves neural development and emotional resilience. It’s the reason our puppies adapt so quickly to new environments, travel well, and approach new experiences with calm curiosity rather than fear.
We don’t just raise dogs, we raise family members prepared for the world.
What Families Notice in ENS Puppies
Families who bring home a puppy raised with Early Neurological Stimulation often notice:
- Faster potty training progress
- Easier adjustment to new surroundings
- Confidence around noises and new people
- A calm, adaptable temperament
- Strong curiosity without excessive fear
These are not accidents; they’re the direct result of careful, ethical breeding practices rooted in science and compassion.

The Bigger Picture: Lifelong Benefits of Early Neurological Stimulation
The long-term effects of ENS go beyond puppyhood. Puppies who experience it tend to grow into dogs that:
- Stay calm during vet visits or grooming
- Handle travel and car rides with ease
- Build stronger bonds with humans
- Excel in therapy, service, or emotional support work
This is why we see Early Neurological Stimulation as part of our responsibility, not just to our puppies, but to the families who trust us to raise them right.
Why It Matters for Ethical Breeding
At Big Hearted Breeders, we believe that ethical breeding is about intentional care and the application of science-based methods. ENS represents exactly that: a hands-on, evidence-backed approach that improves each puppy’s lifelong well-being.
We’re not just producing puppies; we’re shaping the emotional and physical foundation for their entire lives. Early Neurological Stimulation ensures that our Mini Golden Retrievers grow up confident, capable, and ready to love the families who welcome them home.

Frequently Asked Questions
What age do you start Early Neurological Stimulation?
ENS begins on day 3 and continues through day 16, the period when puppies’ neurological systems are developing most rapidly.
Does ENS stress puppies out?
No. The exercises are brief and gentle, designed to introduce mild stress that helps build resilience—not fear or discomfort.
Is ENS scientifically proven?
Yes. It originated from the U.S. Military’s Bio Sensor Program and has since been supported by decades of canine behavioral and developmental research.
Do all breeders use ENS?
Unfortunately, no. ENS requires daily commitment, precise timing, and understanding of puppy development, which is why only responsible, ethical breeders typically implement it.
Will my puppy remember these exercises?
Not consciously, but the effects are lasting. ENS strengthens the brain and nervous system, setting the foundation for better learning and emotional balance later in life.


