If you’ve ever brushed off your puppy’s behavior with “They’ll grow out of it,” you’re not alone. Jumping, biting, barking, pulling on the leash, chewing furniture. Many pet parents assume these behaviors are just part of puppyhood. Sometimes, they are. But sometimes, waiting is the most expensive decision you can make.

Knowing the difference between a normal puppy phase and a developing behavior problem can save you stress, money, and heartbreak later.

What Counts as a Normal Puppy Phase?

Puppies experience predictable developmental stages, especially in their first 18 months. During these phases, certain behaviors are expected.

Common puppy-phase behaviors include:

• Mouthiness and nipping during teething

• Short attention spans

• Occasional accidents during house training

• Temporary fear periods

• Bursts of high energy followed by deep sleep

These behaviors usually improve with consistent guidance, structure, and age.

“Puppies explore the world with their mouths and emotions. What matters isn’t that these behaviors exist. It’s whether they’re improving over time.” – Dr. Ian Dunbar, Veterinarian & Animal Behaviorist

---

When “They’ll Grow Out of It” Becomes a Problem

The red flag isn’t the behavior itself — it’s the pattern.

If a behavior is intensifying, spreading, or causing safety concerns, it’s no longer just a phase.

Signs It’s More Than a Puppy Phase

• Biting that breaks skin or escalates with age

• Jumping that knocks people over

• Fear responses that turn into avoidance or aggression

• Barking that worsens instead of settling

• Destructive behavior linked to anxiety

• Leash reactivity toward people or dogs

• Inability to calm down even after exercise

“Time alone doesn’t fix behavior. Skills fix behavior. And the longer a habit is practiced, the harder it is to undo.” – Pat Miller, Certified Professional Dog Trainer & Author

---

Why Waiting Often Makes Behavior Problems Worse

Behavior is learned through repetition. When puppies rehearse unwanted behaviors — even unintentionally — those behaviors become default coping mechanisms.

What starts as:

• playful nipping

• mild fear

• excitement barking

can evolve into:

• adult biting

• reactivity

• chronic anxiety

And adult dogs don’t get the same social grace as puppies.

“People tolerate behaviors in puppies that would be unacceptable in adult dogs. By the time they seek help, the dog has had months or years of practice.” – Karen Pryor, Behavioral Scientist & Trainer

---

The Hidden Cost of “Waiting It Out”

Many pet parents delay training to save money — but early intervention is almost always cheaper.

Delaying help can lead to:

• More intensive (and expensive) training later

• Limited housing or travel options

• Injuries to people or other pets

• Emotional burnout for pet parents

• Rehoming or surrender in severe cases

Early guidance often means fewer sessions, faster results, and less stress.

Are you finding this article useful? Would you like 100% free access to more articles like these, and free access to over 5,000 vetted pet care service professionals throughout the United States? Sign up here for a free Petworks account, and we’ll email you a  10% discount code, good towards your first pet care services booking on Petworks!

Puppy Phase vs. Real Problem: A Quick Comparison

Likely a Puppy Phase if:

• Behavior improves week to week

• Puppy responds to redirection

• Intensity decreases with structure

• No fear or aggression involved

Likely a Real Problem if:

• Behavior escalates with age

• Puppy ignores or resists guidance

• Fear, anxiety, or aggression appears

• Daily life revolves around managing behavior

---

When to Seek Professional Help

You don’t need to wait for a crisis to get support.

Consider working with a puppy trainer or animal behavior professional if:

• You feel overwhelmed or frustrated

• Progress has stalled

• Safety is a concern

• Advice online feels contradictory

• You’re saying “maybe next month” — repeatedly

“The best time to get help is when you first ask yourself whether you need it.” – Victoria Stilwell, Dog Trainer & Behavior Expert

---

It’s Not a Failure — It’s Responsible Parenting

Needing help doesn’t mean you failed your puppy. It means you’re paying attention.

Most serious behavior problems don’t start as emergencies — they start as small concerns that were easy to ignore.

“Most serious behavior problems don’t start as emergencies. They start as small issues pet parents were told to wait out. Time doesn’t change behavior. Guidance does.” – Kevin Kinyon, Co-Founder, PetWorks

Frequently Asked Questions

Will my puppy grow out of biting?

Some mouthiness improves naturally, but biting that escalates, causes injury, or continues past teething often needs professional guidance.

At what age do dogs calm down?

Many dogs mature emotionally between 18–36 months, but without training, unwanted behaviors often remain — just in a larger body.

Can separation anxiety go away on its own?

True separation anxiety rarely resolves without intervention and often worsens if untreated.

Is it ever too early to hire a dog trainer?

No. Early guidance is usually faster, cheaper, and more effective than fixing ingrained behaviors later.

Am I overreacting by getting help?

Most pet parents who seek help early wish they’d done it sooner — not later.

If you’re asking “Is this just a phase?” that question alone is worth listening to.

Puppies grow.
Habits grow faster.

About PetWorks

Marty Goldstein DVM joined the pet care platform PetWorks as an advisor in its Animal Nutrition care division. Dr Marty Nature’s Blend is on a mission to help your pets live their healthiest lives possible. Dr. Marty’s pet nutrition expertise and guidance has helped PetWorks evolve and become the preeminent animal and pet nutrition consultation service for pet parents in North America.

In 2022, Blue Buffalo Founder Bill Bishop Jr. joined PetWorks as Senior Advisor in our Animal Nutrition Care Division. Bill brings his extensive expertise in pet food innovation and business leadership. His guidance helps PetWorks enhance our pet nutrition service offerings, helping to ensure that pet parents throughout the world receive trusted, science-backed nutritional support for their dogs, cats, and animals.