Adopting a Shelter Dog: How to Choose, Prepare and Help Them Settle

By Dr Duncan Houston.

Adopting a shelter or rescue dog can be one of the most rewarding decisions you make. It also brings a long-term responsibility for another living creature whose health, behaviour and history may not be completely known.

A successful adoption begins before you meet the dog. Choosing a suitable match, preparing your home and allowing a gradual adjustment period can prevent many early problems and give your new companion the best possible start.

Quick Answer

Before adopting a shelter dog:

Consider your lifestyle, budget and future plans.
Choose a dog based on compatibility, not appearance alone.
Ask detailed questions about health, behaviour and history.
Understand the rescue’s adoption and return policies.
Prepare a secure, quiet area before bringing the dog home.
Transfer the microchip registration immediately.
Arrange a veterinary examination soon after adoption.
Keep the first days calm and predictable.
Introduce children and other animals gradually.
Seek help early if medical or behavioural concerns appear.

A shelter dog does not need a perfect owner. They need a realistic, patient and properly prepared one.

Are You Ready to Adopt a Dog?

Dogs may live for well over a decade, so consider how one will fit into your current life and likely future.

Ask yourself:

How many hours will the dog regularly spend alone?
Can I provide daily exercise, training and enrichment?
Can I afford routine and unexpected veterinary care?
Is my housing secure and pet-friendly?
Do I expect to move or travel regularly?
Are all household members genuinely comfortable adopting?
Do I have children, cats, dogs or other animals to consider?
Can I manage grooming, boarding and pet-sitting costs?
Am I willing to work through an adjustment period?
What would happen to the dog if my circumstances changed?

Costs may include:

Adoption fees
Food
Preventive healthcare
Vaccinations
Parasite control
Veterinary consultations
Emergency treatment
Medication
Training
Grooming
Insurance
Boarding or pet sitting
Leads, bedding and enrichment

Love matters enormously, but sadly it does not pay an emergency surgery invoice. Plan for both.

Choose a Dog Who Fits Your Life

The best match is not necessarily the dog with the cutest photograph or saddest story.

Consider:

Adult size and strength
Age
Energy level
Exercise requirements
Grooming needs
Noise and barking tendencies
Confidence around unfamiliar people
Compatibility with children
Compatibility with other animals
Ability to remain alone
Training history
Medical requirements
Housing restrictions
Your experience with dogs

Breed or breed type may offer clues about likely traits, but it cannot predict an individual dog’s complete personality. Focus on the behaviour and needs of the dog in front of you.

RSPCA Australia recommends carefully considering which dog or puppy is appropriate for your family and being ready to provide for their feeding, health, training and exercise needs. RSPCA Australia

Do Not Rely on a Single Shelter Meeting

Shelters are unusual environments. Noise, unfamiliar handlers, limited rest and proximity to other animals may affect how a dog behaves.

A dog who appears quiet may be:

Relaxed
Tired
Unwell
Frightened
Behaviourally inhibited
Overwhelmed by the environment

A dog who appears highly energetic may be:

Excited to leave the kennel
Experiencing stress
Lacking exercise
Struggling with confinement
Naturally active

If possible:

Meet the dog more than once
Walk them away from the kennel area
Spend time together in a quieter space
Involve all adult household members
Ask whether a foster carer has observed them at home
Arrange a carefully managed introduction to an existing dog
Consider foster-to-adopt if available

Behaviour assessments and shelter observations provide useful information, but they cannot guarantee exactly how a dog will behave in every future environment.

How to Choose a Reputable Shelter or Rescue

Look for an organisation that:

Is transparent about known health and behaviour concerns
Provides veterinary records
Uses appropriate vaccination and parasite-control protocols
Microchips animals before adoption where required
Desexes dogs or provides a clear desexing plan
Uses reward-based handling
Asks questions about your household and lifestyle
Explains its return policy
Offers post-adoption support
Does not pressure you into an immediate decision
Is honest when information is unknown

Be cautious if an organisation:

Refuses to provide records
Conceals known aggression or bite history
Will not discuss where the dog came from
Uses punishment-based training
Discourages veterinary examination
Cannot explain its adoption contract
Pressures you to pay immediately
Offers no process for returning a dog safely

A responsible rescue wants an adoption to last. Matching carefully is not gatekeeping. It is part of protecting both the dog and the adopting family.

Questions to Ask About the Dog’s History

Ask:

Was the dog surrendered, found as a stray or transferred?
How long have they been in the shelter or foster care?
Have they previously lived inside a home?
Why were they surrendered?
Have they been returned after a previous adoption?
Have they lived with children?
Have they lived with dogs, cats or smaller animals?
How do they respond to unfamiliar people?
Are they frightened of particular sounds, objects or situations?
Can they be left alone?
Are they comfortable in a crate or pen?
Are they toilet trained?
Have they ever escaped or attempted to escape?
Do they guard food, toys, beds or people?
Have they ever growled, snapped or bitten?
What was happening before and after any incident?
How do they respond to grooming and veterinary handling?
What training methods have been used?
What rewards do they enjoy?

An unknown history does not automatically make a dog unsuitable. It simply means you should make fewer assumptions and plan more carefully.

Questions to Ask About Medical Care

Request copies of all available medical records and ask:

Which vaccinations have been given, and when?
When is the next vaccination due?
Has the dog received internal and external parasite control?
Has heartworm testing or prevention been performed where relevant?
Is the dog desexed?
Is the dog microchipped?
What is the microchip number and registry?
Are any test results pending?
Has the dog recently coughed, vomited or had diarrhoea?
Are there known skin, ear or dental problems?
Is there a history of lameness, injury or surgery?
Does the dog take medication?
Are follow-up examinations required?
What food and feeding schedule are currently used?
Are there known allergies or adverse reactions?
Is short-term pet insurance or post-adoption veterinary care included?

Do not assume vaccination, desexing or parasite-control policies are identical across every shelter or country.

Understand the Adoption Agreement

Read the contract before signing.

Clarify:

The adoption fee
What veterinary care is included
Whether desexing is complete or scheduled
Whether ownership transfers immediately
Who must update the microchip
Any housing or containment requirements
Whether follow-up checks are required
Whether the rescue must be contacted before rehoming
The trial or cooling-off period
The return policy
What support is available after adoption

Returning a dog responsibly is not the outcome anyone wants, but understanding the process before adoption protects everyone if the match is genuinely unsafe or unsustainable.

Prepare Your Home Before Adoption Day

Create a secure, low-traffic area containing:

A comfortable bed
Fresh water
A non-slip floor
A crate or open resting space if appropriate
Safe enrichment
Baby gates where needed
Access to a suitable toilet area
Space away from children and other pets

Remove or secure:

Human medication
Veterinary medication belonging to other pets
Toxic foods
Cleaning products
Rubbish
Electrical cords
Small objects
Children’s toys
Shoes and clothing
Toxic plants
Accessible balconies or windows
Unsecured gates and damaged fencing

RSPCA guidance recommends establishing a secure living area and comfortable retreat while a new dog adjusts to the home. RSPCA Australia

Prepare Essential Supplies

Have these ready:

Secure collar
Identification tag
Well-fitted harness
Fixed-length lead
Food recommended by the shelter
Food and water bowls
Comfortable bedding
Enzymatic cleaner
Waste bags
Safe chew items
Food-dispensing toys
Baby gates or an exercise pen
Suitable transport restraint
Basic grooming equipment

Avoid buying an entire pet-shop aisle before you know what the dog enjoys. Your carefully selected designer bed may be ignored in favour of the cardboard delivery box.

Prevent Escape During the Transition

Newly adopted dogs may be unfamiliar with the area and have no reliable bond or recall.

For the first weeks:

Check every gate and fence
Use a secure harness and collar
Attach identification
Use a fixed-length lead outdoors
Keep the dog leashed between the vehicle and house
Do not allow off-lead exercise in unfenced areas
Supervise access to the garden
Ask visitors to check doors and gates
Avoid retractable leads in busy or unfamiliar environments

For dogs with a known escape history, ask a qualified professional about using two secure points of attachment.

Transfer the Microchip Registration

A microchip only helps if its registration details are current.

Confirm:

The microchip can be detected
The number matches the adoption records
Ownership has been transferred
Your phone number and address are correct
An emergency contact is included
You know which database holds the registration

The American Veterinary Medical Association advises adopters to obtain the microchip number from the shelter and ensure the chip is correctly registered. AVMA

Microchips do not replace visible identification. Use both a registered chip and an identification tag.

The Journey Home

Use a secure crate, vehicle barrier or appropriate restraint.

During transport:

Keep the car comfortably ventilated
Avoid loud music
Drive smoothly
Prevent the dog from roaming inside the vehicle
Do not allow their head to hang far outside a window
Travel directly home where possible
Bring towels in case of motion sickness or an accident

Do not stop at a dog park, pet shop, café and three relatives’ houses on the way home. Your new dog has already had quite a day.

The First Day at Home

Keep the arrival quiet.

Start by:

Taking the dog to the designated toilet area on lead.
Allowing them to explore one part of the home.
Showing them their water and resting area.
Offering the food recommended by the shelter.
Providing calm supervision.
Allowing uninterrupted rest.

Avoid immediately:

Inviting visitors
Giving a bath unless medically necessary
Taking the dog to crowded locations
Forcing affection
Allowing children to surround them
Introducing every household animal at once
Removing food or toys to “test” guarding
Giving unrestricted access to the entire home

A dog who hides or keeps their distance may need space. Sit nearby, remain calm and allow them to approach.

The First Few Days

Focus on predictability rather than adventure.

Establish a simple routine for:

Meals
Toilet breaks
Sleep
Short walks
Medication
Gentle training
Quiet enrichment
Calm household interaction

Keep walks brief and choose quiet routes. Your dog does not need to meet every neighbour or canine resident immediately.

Signs of stress may include:

Reduced appetite
Restlessness
Panting
Pacing
Hiding
Clinginess
Difficulty sleeping
Toilet accidents
Barking
Diarrhoea
Reluctance to interact
Increased startle responses

Some mild changes may reflect adjustment, but persistent or severe signs require veterinary advice.

What the “3-3-3 Rule” Really Means

You may hear that an adopted dog needs:

Three days to decompress
Three weeks to learn the routine
Three months to feel at home

This can be a helpful reminder that adjustment takes time, but it is not a clinical rule or deadline.

Some dogs settle quickly. Others need considerably longer, particularly if they have:

Experienced trauma
Spent a long time in a shelter
Lived as strays
Changed homes repeatedly
Developed separation-related distress
Ongoing pain or illness
Limited previous socialisation

The ASPCA presents the 3-3-3 concept as a general guideline and emphasises that individual pets adjust at different rates. ASPCA

Judge progress by the dog in front of you, not by the calendar.

Arrange a Veterinary Examination

Unless the shelter has arranged otherwise, book a veterinary examination soon after adoption.

Bring:

Adoption paperwork
Vaccination history
Microchip information
Medication
Test results
Details of current food
Notes about coughing, vomiting, diarrhoea or behaviour
Photos or videos of concerning signs

Your veterinarian may discuss:

Physical examination findings
Vaccination requirements
Parasite prevention
Heartworm prevention or testing
Desexing status
Dental health
Weight and nutrition
Skin and ear disease
Joint health
Medication
Behaviour
Insurance and preventive care

Keep the dog away from high-risk dog areas until your veterinarian has reviewed their vaccination and infectious-disease status.

Medical Signs That Need Prompt Veterinary Advice

Contact a veterinarian if your new dog develops:

Persistent coughing
Repeated vomiting
Moderate or severe diarrhoea
Blood in vomit, urine or faeces
Marked lethargy
Loss of appetite
Increased thirst or urination
Pain
Lameness
Eye redness or discharge
Nasal discharge
Skin lesions
Difficulty urinating
Rapid or laboured breathing
Collapse
Seizures
Abdominal swelling
Suspected toxin exposure

Difficulty breathing, collapse, repeated seizures, severe bleeding, inability to urinate or major trauma require emergency veterinary care.

Keep the Diet Consistent Initially

Continue the shelter’s current food for the first several days unless your veterinarian advises otherwise.

Sudden dietary changes may contribute to:

Vomiting
Diarrhoea
Flatulence
Reduced appetite
Confusion about whether illness or diet is causing symptoms

If you plan to change food, transition gradually.

Feed in a quiet location and separate the new dog from other animals. Do not reach into the bowl or repeatedly remove food to prove that you are “in charge”.

Restart Housetraining From the Beginning

Even a previously housetrained dog may have accidents in a new environment.

Take them to the toilet area:

After waking
After meals
After drinking
After play
Before bedtime
Whenever they sniff, circle or become restless

Reward outdoor toileting immediately.

Supervise indoors and restrict access to unused rooms. Clean accidents with an enzymatic cleaner and never punish the dog.

If accidents are frequent, painful, sudden or associated with increased thirst, diarrhoea or straining, arrange veterinary assessment.

Introduce Existing Dogs Gradually

Before introductions, ensure both dogs have appropriate veterinary and parasite care.

Where possible:

Begin in a neutral, quiet outdoor area.
Use one calm handler per dog.
Walk in the same direction with distance between them.
Reward relaxed behaviour.
Gradually decrease distance if both dogs remain comfortable.
Keep the first home interaction brief.
Provide separate resting and feeding areas.

Initially remove high-value toys, chews and food bowls from shared spaces.

RSPCA guidance recommends health checks and separate safe retreats when introducing a new dog to an existing dog. RSPCA Australia

Do not leave the dogs together unsupervised until their relationship is well established.

Introduce Cats and Smaller Animals Carefully

Keep the dog physically separated from cats and smaller animals initially.

Use:

Baby gates
Closed doors
Leads
Exercise pens
Elevated cat routes
Dog-free rooms
Secure enclosures for small animals

Reward calm behaviour at a safe distance.

Never allow chasing, even if the dog appears playful. Predatory behaviour may be quiet and focused rather than noisy or aggressive.

Some dogs cannot safely live with cats, rabbits, birds or other small animals. Seek professional advice if the dog stalks, freezes, trembles with excitement, lunges or cannot disengage.

Keep Children Safe

Supervise every interaction between a child and a newly adopted dog.

Teach children to:

Leave the dog alone while eating
Avoid approaching the dog in bed
Never climb on, hug or corner the dog
Avoid taking toys or chews
Let the dog move away
Use quiet voices
Ask an adult before interacting

Provide a child-free retreat where the dog cannot be followed.

Even friendly dogs may bite when frightened, painful, startled or trapped. Supervision means an attentive adult is close enough to intervene, not watching from the other side of the room while scrolling through their phone.

Begin Reward-Based Training

Start with practical foundation skills:

Name recognition
Eye contact
Hand targeting
Come
Leave it
Drop
Go to bed
Calm harnessing
Waiting at doors
Loose-lead walking

Keep sessions brief and use food, toys or access to enjoyable activities as rewards.

Avoid:

Yelling
Physical corrections
Alpha rolls
Choke chains
Prong collars
Shock collars
Deliberately provoking reactions
Punishing growling

Your first training priority is communication and trust, not creating a canine military recruit by Tuesday.

Practise Being Alone Gradually

Do not wait until the first full workday to discover that your new dog cannot cope alone.

Begin with brief separations while monitoring by camera:

Provide a safe resting area.
Offer appropriate enrichment.
Step away briefly.
Return before distress develops.
Increase duration gradually.

Watch for:

Persistent barking or howling
Pacing
Panting
Drooling
Destruction around exits
Toileting
Refusing food
Escape attempts
Self-injury

These signs may indicate separation-related distress rather than boredom or disobedience. Seek veterinary or qualified behavioural help early.

Behavioural Red Flags That Need Professional Help

Arrange professional support if the dog:

Bites or snaps
Guards food, objects or people
Shows intense fear
Cannot settle
Panics when left alone
Repeatedly attempts to escape
Lunges at people or animals
Stalks household pets
Cannot tolerate routine handling
Freezes or growls around children
Becomes suddenly aggressive
Shows rapidly worsening behaviour

Pain and medical illness can contribute to behavioural change, so begin with a veterinary examination.

Look for a qualified reward-based trainer, accredited behaviour consultant or veterinary behaviourist. Avoid anyone who promises guaranteed results or recommends intimidation and painful equipment.

If the Adoption Is Not Working

Contact the shelter early rather than waiting for a crisis.

Explain:

What is happening
When it occurs
Who is involved
What management has been attempted
Whether anyone has been injured
Whether veterinary assessment has occurred

The shelter may provide:

Behavioural advice
Training support
Veterinary assistance
Temporary foster care
A managed return
Help finding a more suitable placement

Do not privately rehome the dog without checking the adoption agreement. Never abandon the dog or conceal bite history from another caregiver.

Sometimes returning a dog through the proper process is the safest decision. Responsible rehoming is painful, but it is better than allowing an unsafe situation to escalate.

Common Adoption Mistakes

Choosing Only by Appearance

A beautiful dog can still be completely unsuitable for your lifestyle.

Giving Immediate Access to Everything

Too much freedom may lead to accidents, destruction and overwhelming stimulation.

Inviting Everyone Over

Allow the dog time to rest before introducing visitors.

Assuming Shelter Behaviour Predicts Home Behaviour

Dogs may become more confident, fearful or energetic as they settle.

Forcing Affection

Let the dog choose when to approach.

Changing Food Immediately

A rapid diet change can add gastrointestinal upset to an already stressful transition.

Visiting Dog Parks Too Soon

Medical status, recall and social behaviour should be assessed first.

Punishing Warning Signals

Growling provides valuable information. Address the cause rather than silencing the warning.

Waiting Too Long to Get Help

Early intervention is usually easier than repairing a behaviour after months of rehearsal.

Frequently Asked Questions

How long will a shelter dog take to settle?

It varies from days to many months. Age, health, temperament, previous experiences and household environment all influence adjustment.

Should I crate my newly adopted dog?

Only if the dog is comfortable with confinement. A pen or puppy-proof room may be safer for dogs who panic inside crates.

Should I let the dog sleep in my bedroom?

Many dogs settle better near their new caregivers. Choose an arrangement that is safe and sustainable, and make future changes gradually.

When can friends visit?

Wait until the dog is eating, sleeping and navigating the household comfortably. Begin with one calm visitor rather than a welcome-home party.

When can the dog go off lead?

Only in a securely fenced area until recall, identification and the dog’s response to the environment are reliably understood.

Is pet insurance worth considering?

Insurance may help with unexpected veterinary costs, but policies, exclusions and waiting periods vary. Review coverage before medical problems are diagnosed where possible.

Can an older shelter dog still bond with a new family?

Absolutely. Adult and senior dogs can form strong relationships and may already have useful household skills.

Final Thoughts from Dr Duncan Houston

Adopting a shelter dog is not about rescuing them on Saturday and expecting a perfectly adjusted family pet by Monday. It is about building safety, communication and trust one ordinary day at a time.

Choose carefully, prepare properly and ask for help early. With patience and realistic expectations, your new dog can become far more than an adoption story. They can become family.

Need Help Before or After Adopting?

Choosing a dog or managing the first few weeks can feel overwhelming, particularly when medical records are incomplete or unexpected behaviours emerge.

ASK A VET™ can help you review health concerns, understand your dog’s behaviour, prepare questions for the shelter and create a practical settling-in plan. You can also share photos, videos and records for more personalised guidance.

Visit AskAVet.com or download the ASK A VET™ app for veterinary support throughout your dog’s adoption, transition and ongoing care.

Know how they are, wherever they are

The ASK A VET™ Tracker logs live location and activity trends, so a change in routine never goes unnoticed.

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About the author

Dr Duncan Houston

Veterinarian · Founder of ASK A VET

Every ASK A VET article is written and reviewed by qualified veterinarians.

About Dr. Duncan →drduncanthevet

Adopting a Shelter Dog: How to Choose, Prepare and Help Them Settle