Why Puppies Don’t Grow Out of Bad Behaviour

“They’ll grow out of it.”

It is one of the most common things puppy owners hear from friends, family, neighbours, and other dog owners.

And to be fair, it is usually meant kindly. People are often trying to reassure you. They are trying to say, “Don’t panic, this is normal.”

Sometimes that part is true.

Mouthing, jumping up, barking, zooming around the house, pulling on the lead, getting a bit wild as they hit the teenage stage… a lot of puppy and adolescent behaviour is developmentally normal.

But normal does not always mean harmless. And normal definitely does not mean it is best left alone.

Because practice makes permanent.

If a behaviour keeps being rehearsed, keeps working, and keeps getting repeated, it often gets stronger, not weaker. Puppies do not magically grow out of bad behaviour just because the calendar moved on. In many cases, they only grow out of it when we help them through it.

• Puppies do not automatically grow out of bad behaviour
• Dogs repeat what works
• Practice makes permanent
• Waiting can allow habits to get stronger
• Guidance, prevention, and consistency matter more than age alone
• Some behaviours soften with maturity, but habits improve fastest when owners actively teach what they want instead

Why people say “they’ll grow out of it”

The phrase usually comes from a good place. People have seen puppies do silly puppy things before and watched some of those behaviours soften as the dog matured. A gangly puppy becomes less clumsy. A baby dog who could not settle for five seconds starts sleeping more deeply. A youngster who could barely focus gradually becomes easier to live with.

So yes, age can help.

But age is only part of the picture. Behaviour does not change in a vacuum. Puppies are learning all the time. They are learning what gets attention, what gets access, what gets relief, what gets them closer to excitement, and what works in real life.

That is why I often encourage owners to zoom out and look at the foundations first. If you have not already read Dog Training: 6 Essentials Before Training Works, it explains why behaviour is so often shaped by sleep, fulfilment, health, nutrition, chew-lick-sniff outlets, and the overall relationship, not just whether you have “done enough training”.

What looks like stubbornness, naughtiness, or a phase a puppy will surely leave behind can often be a dog practising a pattern over and over again in an environment that keeps reinforcing it.

Practice makes permanent

This is the bit I wish more owners were told early on.

Dogs repeat what works.

That is not them being manipulative. It is simply how learning works. Reward-based training is built on the same principle: behaviours that are reinforced are more likely to happen again. The RSPCA explains this clearly in its training advice, noting that when dogs receive something they like after a behaviour, they are more likely to repeat it. :contentReference[oaicite:0]{index=0}

That matters because many unwanted behaviours are rewarding from the dog’s point of view:

• Jumping up gets attention
• Barking gets interaction
• Pulling works because it gets the dog somewhere faster
• Stealing things creates a fun chasing game
• Reacting can make scary things move away
• Feet chasing turns into exciting movement and noise

This is why waiting and hoping can backfire. While you are waiting for the behaviour to “pass”, your puppy may be getting dozens or even hundreds of repetitions of it. By the time they are older, bigger, faster, and stronger, you are not just dealing with a puppy phase. You are dealing with a well-practised habit.

This links closely with Impulse Control and How to Calm a Hyper Dog. A lot of behaviour improves not because we demand more obedience, but because we build skills, meet needs, and make calmer choices easier.

Behaviours puppies often do not “just grow out of”

Jumping up

Owners often hear, “He’s only saying hello” or “She’ll stop when she’s older.”

Sometimes they do become less frantic with maturity. But jumping is very often reinforced by the exact thing the dog wants: attention, touch, voices, eye contact, movement, and greetings. As I explain in How to Stop Your Dog Jumping Up at People, the goal is not just to stop the behaviour, but to teach a calm, polite greeting instead.

A little puppy launching up at your knees may look cute. A bigger adolescent dog doing the same to children, visitors, runners, or older relatives becomes much less charming very quickly.

That is why setting the dog up for success matters. Manage greetings. Use distance. Reward four paws on the floor. Prevent the rehearsal where possible.

Mouthing and biting

Puppy mouthing is normal. Teething is normal. Play biting is common. Evening gremlin behaviour is common too. But “common” is not the same as “leave it and hope for the best”.

In The Ultimate Guide to Puppy Mouthing & Biting, I talk about the role of teething, frustration, over-arousal, and overtiredness. Many puppies get mouthier when they need more sleep, clearer boundaries, calmer play, and better outlets. Human skin should not become part of the game.

If a puppy practises grabbing sleeves, hands, ankles, and shoelaces every day, that does not usually disappear on its own. It needs guidance. For specific ankle and foot chasing, you might also find How to Stop Puppy Biting Feet & Ankles helpful.

Pulling on the lead

This one catches so many people out because the dog gets stronger faster than the owner expects.

Pulling often works. That is the problem. As I explain in The Ultimate Guide to Loose Lead Walking, dogs pull because they naturally move faster than we do, the world is full of exciting things, and they learn that pulling gets them where they want to go faster.

Very few dogs wake up one day and decide to walk beautifully because they have had a birthday. Loose lead walking is a taught skill. It needs repetition, reinforcement, and the right setups.

Barking

Owners are often told, “Ignore it, they’ll stop eventually.” Sometimes that can be part of the picture. But barking is not one behaviour with one cause. It can be attention-seeking, frustration, fear, excitement, alerting, or a response to stress.

In Attention-Seeking Barking in Dogs, I explain that dogs repeat what works. If barking has a reinforcement history, it keeps showing up until calm becomes clearer, easier, and more worthwhile.

That is why the answer is not just “wait”. It is understanding the function of the barking and then changing the pattern.

Recall problems

Many owners assume recall will improve as the dog matures. In reality, adolescence often makes recall harder before it gets better. The environment becomes more interesting. Dogs become more independent. Scent, movement, people, dogs, birds, and freedom all start to compete more strongly with you.

Recall is not something dogs magically absorb with age. It is a trained skill that needs value, consistency, and sensible proofing. If this is an area you are struggling with, start with Dog Recall Training.

Overarousal, zoomies, and struggling to settle

One of the biggest myths I see is the idea that a puppy who is bouncing off the walls simply needs “wearing out”. Sometimes owners then add more and more stimulation, more and more activity, and more and more chaos to a dog who is already struggling to regulate.

In Why Does My Puppy Get Zoomies?, I talk about zoomies as the nervous system saying, “I’ve got a lot going on and I don’t quite know what to do with it.” That can be excitement, stress, frustration, overtiredness, overstimulation, or a mix of everything.

This is where How Much Sleep Does My Dog Need? becomes so relevant. Overtired puppies often look hyper, bitey, barky, and unable to switch off. They may not need more hype. They may need more recovery. And if your dog feels constantly “on the go”, How to Calm a Hyper Dog is a great next read.

Fearful behaviour and reactivity

This is the area where “they’ll grow out of it” can be particularly unhelpful, and sometimes risky.

If a dog is feeling worried, overwhelmed, or unsafe, repetition does not necessarily build confidence. Quite often it builds more stress, more anticipation, and more defensive habits. In Force-Free Methods to Help Fearful Dogs, I talk about why punishment suppresses behaviour while increasing emotional distress. Quiet is not the same as comfortable.

That is also where Trigger Stacking matters. If stressors keep piling up, dogs often cope worse, not better. Dogs Trust also notes that reactive behaviour can show up as barking, lunging, growling, or snapping, and that these behaviours are often shaped by how the individual dog feels and how they have learned to cope. :contentReference[oaicite:1]{index=1}

Separation-related problems

Some puppies follow you everywhere, cry when you leave the room, or only settle if they are physically close to you. People often say it is cute, and in the early days it can be. But puppies are not born knowing how to be alone. Independence is a learned skill.

As I explain in How to Prevent Separation Issues in Puppies, what feels cute at ten weeks can quietly grow into genuine separation issues if we do not guide it properly. And in The Ultimate Guide to Separation-Related Problems in Dogs, I make the point that these are not “bad behaviours” at all, but emotional responses to feeling unsafe.

The RSPCA makes a similar point, explaining that learning to be left alone is an important part of training and that dogs are not doing this out of revenge. They are distressed. :contentReference[oaicite:2]{index=2}

When dogs might grow out of it

To keep this balanced, there are things that often soften with maturity.

• A bit of gangly puppy awkwardness
• Some baby-brain chaos in very young pups
• Short-lived developmental confidence wobbles
• Some of the sheer intensity of puppyhood

But even here, context matters. A puppy may become less clumsy with age, but barking that has been reinforced often becomes a habit. A dog may become physically calmer than they were at twelve weeks, but poor recall, frantic greetings, and lead pulling usually improve because someone has actively taught them better skills.

So yes, behaviour may soften with maturity. But habits become stronger with repetition.

The teenage dog phase is where owners often get caught out

Adolescence is often the point where people suddenly feel like their lovely puppy has “forgotten everything”.

The RSPCA says adolescence can begin anywhere between six and twelve months and may continue until around eighteen to twenty-four months. During this time, hormonal changes and brain reorganisation can make dogs appear less obedient, more motivated to explore, more energetic, and less able to control their impulses. It specifically notes that this stage can bring excessive barking, jumping up, nipping, biting the lead, and other frustrating behaviour. :contentReference[oaicite:3]{index=3}

This is exactly why the phrase “they’ll grow out of it” can be so misleading. Teenage dogs often look worse before they look better. They are stronger. Faster. More independent. More interested in the world. More likely to test the routines that used to work smoothly.

That does not mean your training has failed. It means this is a phase where support matters more, not less.

If your adolescent dog is suddenly more impulsive, more mouthy, more barky, more spring-loaded, or harder to settle, this is where good foundations really matter: sleep, fulfilment, calm routines, sensible outlets, and realistic expectations.

For dogs who struggle to settle in busy social environments, 7 Puppy-Settling Tips for Cafés and Pubs is useful too.

What to do instead of waiting and hoping

1. Prevent rehearsal

The more often a behaviour happens, the more fluent it can become. If your puppy practises jumping on every guest, dragging you to every sniff, or barking for every bit of attention, you are dealing with repetition as well as emotion.

That does not mean perfection. It means reducing the opportunities for unwanted behaviour to become the default.

2. Manage the environment

Create setups where your dog can actually succeed. Use distance. Use leads and harnesses well. Avoid chaotic greetings. Make the right choice easier than the wrong one.

3. Teach the behaviour you want instead

“Don’t jump” is not a behaviour. “Stand still with four paws on the floor” is. “Don’t bark” is not a plan. “Go to your mat and settle” is. “Don’t pull” is not as clear as teaching the dog what loose lead walking actually pays.

4. Meet underlying needs

So many behaviour problems are made worse by tiredness, frustration, over-arousal, under-fulfilment, stress, and unclear routines. This is why I come back again and again to the 6 essentials before training works. Sometimes behaviour is not just about training harder. Sometimes it is about supporting the dog better.

5. Reward the right behaviour

Reward calm. Reward check-ins. Reward four paws on the floor. Reward quiet. Reward walking with you. Reward the choices you want to see more of. Dogs repeat what works, so make the good stuff worth repeating.

6. Get help sooner rather than later

If behaviour is escalating, affecting daily life, or has any fear, distress, or aggression component, early support matters. The RSPCA advises speaking to your vet if there is a concerning behaviour change, and to seek qualified behavioural support when needed. :contentReference[oaicite:4]{index=4}

They grow through it, not out of it

This is the key message I want owners to hold on to.

Your puppy may well become easier with age. They may become more settled, more focused, and less chaotic than they were in the very early months.

But good behaviour rarely appears by accident.

Dogs do not just grow out of bad behaviour alone. They grow through it with guidance. With management. With consistency. With enough sleep. With appropriate outlets. With calm repetition. With owners who stop waiting for the phase to end and start teaching the dog in front of them.

So yes, some things get easier as dogs mature.

But if you are relying purely on time, you are taking a gamble.

They only grow out of it when we help them through it.

Need help with puppy or adolescent dog behaviour?

If you are dealing with jumping up, barking, mouthing, pulling on the lead, poor recall, overexcitement, or a teenage dog who suddenly seems to have misplaced their brakes, getting support early can make a huge difference.

You can explore my dog training services for private consultations and support, or browse my online courses if you would like practical, step-by-step help you can work through at home.

If recall is your biggest struggle, my Rapid Recall Online Course is a great place to start. If you need help with calm focus, manners, and everyday listening, have a look at Outstanding Obedience.

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