Understanding the Second Fear Period in Dogs: What It Is and How to Support Your Pup Through It

You’ve survived puppyhood, made it through toilet training, and your pup is finally settling into family life—and then suddenly, it’s like they’ve forgotten everything. They’re nervous about things they used to love, won’t settle, and seem extra sensitive. Sound familiar? Welcome to the second fear period—a completely normal, albeit confusing, phase in your dog’s development.

Let’s break down what’s happening and, more importantly, how you can support your dog through it.

What Is a Fear Period?

A fear period is a temporary developmental stage where dogs become more sensitive and cautious about the world around them. Their “danger brain” is switched on, and even minor, previously harmless things can feel like big threats. These periods are nature’s way of helping dogs learn what to avoid for survival—but in our modern world, they can be a little inconvenient!

When Do Fear Periods Happen?

Most dog owners have heard of the first fear period, which occurs between 8–11 weeks of age—right in the middle of their socialisation window. But what’s often overlooked is the second fear period, which typically shows up in adolescence, around 6 to 18 months of age.

This timeline can vary:

• Small breeds tend to enter it earlier.

• Large and giant breeds may experience it later.

• Some dogs go through multiple fear periods during this time, lasting anywhere from a few days to a few weeks.

  
  

Why Does the Second Fear Period Happen?

This stage coincides with big hormonal and neurological changes. As your dog reaches sexual and social maturity, they become more alert, aware, and cautious. Essentially, their brain is upgrading—and all that re-wiring can make even the most confident dog act uncertain or nervous.

You might notice your once-outgoing pup is now hesitant, more vocal, or suddenly reactive around other dogs, strangers, or new experiences. It's not regression—it's development.

Signs Your Dog Is in Their Adolescent Fear Period

Every dog is different, but common behaviours include:

• Barking, growling, or snapping at unfamiliar people, animals, or objects

• Hesitating or refusing to walk past something they used to be fine with

• Hiding, trembling, or clinging to you

• Stress signs: panting, yawning, lip licking, excessive drooling

• Toilet accidents, barking more than usual, or training regression

These are all normal, and—importantly—temporary.

How to Help Your Dog Through It

1. Be Patient and Understanding

This isn’t stubbornness or bad behaviour. Your dog is learning how to process the world with a new, more alert brain. Don’t punish or force them into uncomfortable situations. Let them approach things in their own time, and reward calm behaviour.

Pro tip: If your dog is scared of something like the vacuum, start small. Turn it on in another room and reward your dog for staying calm. Gradually work up from there.

2. Stay Consistent

Keep routines stable. Too much change during this time can heighten anxiety. Stick to regular walks, feeding times, and consistent rules so your dog feels safe.

3. Focus on Positive Socialisation

Exposure is still key—but in a calm, controlled way. Think quality over quantity. Slowly introduce your dog to new environments, sounds, people, and animals. Use treats and praise to build positive associations.

4. Keep Training Short and Sweet

Training is still important, but don’t overdo it. Focus on short, success-driven sessions. Go back to basics if needed and keep everything fun, engaging, and low-pressure.

5. Offer Comfort Without Reinforcing Fear

Yes, it’s okay to comfort your dog. You’re not reinforcing fear by showing support—you’re reinforcing trust. Stay calm and upbeat, and offer reassurance when they need it.

6. Ask for Help if You Need It

If your pup is really struggling, don’t go it alone. This is where Clever Canine Co. can help. Our dog training classes aren’t just for little pups—adolescent and adult dogs benefit hugely from group classes. Our team of experienced trainers will guide you through socialisation, obedience refreshers, and confidence-building exercises, all in a safe, supportive space.

Final Thoughts

The adolescent fear period can feel like a step backwards—but it’s actually a leap forward in your dog’s development. With patience, structure, and a little help, you’ll come through this phase with a more confident, resilient companion by your side.

And remember—you’re not alone in this. Whether you’re looking for a safe place to socialise your dog, need personalised advice, or want to keep building their training foundation, we’re here for you at Clever Canine Co.

Let’s help your dog grow into the calm, confident companion you know they can be.