Puppy Development Timeline

Welcome. This printable timeline helps you understand what’s normal during your puppy’s first year — and what deserves closer attention.
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Puppies don’t develop in a straight line. They move through stages. Some phases feel easy. Others feel chaotic. Most are temporary.
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Use this guide as a reference, not a rulebook.

🖨️ Print This Timeline

🐾 8–10 Weeks: Adjustment Phase

Focus

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Safe sleep setup

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Consistent potty routine

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Gentle exposure to home environment

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Short bonding sessions

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Calm crate introduction

Normal at this stage:

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18–20 hours of sleep

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Nighttime whining

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Frequent accidents

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Short attention span

🌎 10–14 Weeks: Socialization Window

Focus

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Positive exposure to new environments

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Meeting stable, vaccinated dogs

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Calm car rides

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Gentle handling (paws, ears, mouth)

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Building confidence

Normal at this stage:

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Curiosity

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Occasional startle responses

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Growing independence

🦷 3–4 Months: Teething & Testing

Focus

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Structured chew outlets

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Short, consistent training sessions

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Reinforcing calm behavior

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Managing environment proactively

Normal at this stage:

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Increased biting

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Chewing household objects

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Zoomies

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Selective listening

⚡ 5–6 Months: Early Adolescence

Focus

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Reinforcing training

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Tightening structure

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Clear boundaries

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Preventing regression

Normal at this stage:

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Slower response to cues

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Testing limits

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Increased energy

🔥 6–9 Months: Teenage Phase

Focus

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Calm confidence building

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Continued structure

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Preventing overexposure during fear phases

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Maintaining leash skills

Normal at this stage:

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Sudden sensitivity

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Boundary testing

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Energy spikes

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Temporary regression

🐕 9–12 Months: Emerging Maturity

Focus

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Consistency

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Reinforcing impulse control

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Strengthening recall

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Building reliability

Normal at this stage:

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Gradual settling

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Longer attention span

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Occasional backslides

🚩 Call Your Vet If You Notice:

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Persistent lethargy

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Ongoing vomiting or diarrhea

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Fear that intensifies instead of improves

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Refusal to eat for more than 24 hours

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Unprovoked aggression

✨ Enjoy this timeline?
If this helped you understand what phase you’re in, the book goes deeper into:

• Fear periods and confidence building
• Managing regression
• Training during adolescence
• When behavior is developmental vs. medical

→ Read the full Puppy Development Timeline guide
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→ Explore Puppy 101: Start Here
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→ Buy the book on Amazon

You can also check out some of our other free resources:

→ Puppy Supplies Shopping List

→ Kids & Puppies Guide

Not sure which dog fits your life and family? Head over to our Meet the Breeds page to explore the most popular and beloved breeds.