How to Help Your Pets Get Along With a New Pet

Bringing a new pet home can be exciting, but the first meeting does not always go smoothly. An existing pet may feel confused, protective of its territory or unsettled by a new animal suddenly entering its space.

A gradual introduction gives both animals time to become familiar with each other's smell, sounds and presence. Whether you are introducing a new dog to a dog, a cat to a cat or pets of different species, patience is usually more effective than forcing them to interact immediately.

Prepare Separate Spaces First

Before bringing the new pet home, prepare a separate area where it can eat, sleep and relax. This gives the newcomer a safe place to settle in without immediately facing the resident pet.

Keep food bowls, bedding, toys and other important resources separate at first. This can help reduce competition and give both animals time to adjust.

The new pet should also have access to water and an appropriate toilet area from the beginning.

Let Them Learn Each Other's Smell

Scent is an important part of how dogs and cats understand their surroundings.

Before allowing direct contact, let each pet become familiar with the other's smell. You can place a blanket, towel or bedding carrying the other animal's scent in their respective spaces.

Allow them to investigate at their own pace. There is no need to push the item towards them or force a reaction.

Start With a Barrier

Once both animals appear comfortable with the new smells, allow them to see each other through a safe barrier.

A baby gate, secure pet gate or another appropriate separation can allow visual contact while preventing direct interaction.

Keep the first sessions short. If both animals remain calm, gradually increase the amount of time they spend near each other.

Choose a Calm First Meeting

The first direct meeting should take place in a controlled environment rather than during a chaotic or highly exciting moment.

For dogs, a neutral outdoor location can sometimes be useful when appropriate and safe. For cats, introductions are generally better managed indoors through gradual separation and controlled contact.

Keep the animals supervised and allow them to approach at their own pace.

Watch Their Body Language

Pay attention to how both pets behave during every stage of the introduction.

Relaxed body language, curiosity and brief investigation can be positive signs. On the other hand, persistent growling, hissing, lunging, chasing, stiff posture, raised hackles or attempts to escape indicate that the interaction should be interrupted.

Do not punish an animal for displaying fear or discomfort. Instead, increase the distance and return to an easier stage of the introduction.

Keep Food and Toys Separate

Food and valuable toys can create competition between animals that are still getting used to each other.

Feed pets separately during the early stages and avoid leaving high-value treats or toys between them during unsupervised interactions.

Once the animals become comfortable together, you can gradually assess whether they can share space around everyday resources.

Give Your Existing Pet Individual Attention

A new pet can change the household routine, which may leave the existing animal feeling neglected.

Continue providing regular walks, playtime, training and one-to-one attention. Maintaining familiar routines can help reduce stress during the transition.

This is particularly important when the resident pet has been the only animal in the household for a long time.

Do Not Rush the Process

Some pets become comfortable with each other within days, while others may need several weeks or longer.

There is no fixed timetable that works for every household. Age, temperament, previous experiences, socialisation and the species involved can all affect how quickly animals adapt.

If an interaction becomes tense, go back to the previous stage instead of trying to force progress.

Never Leave New Pets Unsupervised at First

Even if the first few meetings appear successful, avoid leaving the animals alone together until you are confident they can safely share the space.

This is especially important when introducing animals of different sizes or species. A playful interaction can quickly become unsafe if one animal becomes frightened or overly excited.

Use separate rooms, gates or other safe arrangements when you cannot supervise them.

Watch for Signs of Ongoing Stress

Some animals may not show obvious aggression but can still be struggling with the change.

Changes in eating, sleeping, toileting, hiding behaviour or normal activity can indicate that a pet is having difficulty adjusting.

If concerning behaviour continues or either animal appears persistently frightened or aggressive, speak with a veterinarian or qualified animal behaviour professional for individual guidance.

Build Positive Associations

Reward calm behaviour whenever appropriate. A favourite treat, gentle praise, play session or other positive experience can help pets associate the presence of the new animal with something pleasant.

Keep rewards appropriate for each animal and avoid creating competition by giving treats too close together if either pet becomes possessive.

The goal is not to make the animals interact constantly. It is to help them learn that sharing the household can be safe and predictable.

Give Both Pets Time to Adjust

A successful introduction is less about making two animals become immediate friends and more about creating a comfortable relationship over time.

Some pets may eventually sleep together and play regularly, while others may simply learn to coexist peacefully. Both outcomes can be perfectly acceptable.

A calm environment, gradual introductions, separate resources and careful supervision can give the new relationship the best possible start.