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Writer's pictureZia Mowbray

How to Introduce Cats

Have you just adopted a cat and are now hoping they get along with your other ones? Or are you wanting an extra meow in your morning but not sure how to go about introducing cats? Worry not, because we have a how-to guide right here. (And a list of adoptable cats right here, or kittens, if that’s what you’d prefer!)


Kittens for adoption northern rivers
Two of our most recently adopted kittens from the shelter!

  • Step 1: Choosing a new cat


The first step in creating harmony between your new cat and the existing cats in your household is to pick the best possible new cat for your household and lifestyle. All cats are individuals and, just like people, some may merge into your household better than others. An anxious cat is much more likely to behave aggressively than a cat that is comfortable and relaxed. If you use patience in the initial stages of the introduction process you will increase your chances of a harmonious household, but it is important to go about the adoption process discussing with your local shelter which cats enjoy having siblings to ensure the smoothest results.


How do you know if a cat will be happy with other cats?


​Cats that have previously lived with another cat are more likely to get along with other cats than a cat who was an “only child.” The shelter may not have the information on if the cat lived with other cats, so you should ask them about how the cat behaves around other cats in the shelter. 


​Personality also plays a big role in having multiple cats. Think about the things that the cats already in your home like to do/ which personalities they might gel with the best. If they like to play, getting another playful cat is okay. If your cats prefer to lie in the sun all day you should look at adopting a cat who has similar habits. A young kitten or adolescent is probably not a good idea for a household with an older or grumpy cat.


  • ​Step 2: Reducing the likelihood of problems


Even if the cat you are adopting is good with other cats there is always the possibility of problems when introducing strangers to each other. There are several steps that you can take to reduce the likelihood of problems.


1: Before bringing your new cat home, create a separate “territory” for them. This area should be equipped with food, water, a scratching post, a litter tray, access to natural sunlight and comfortable resting places.


Your other cats should have their own separate territory. Make certain that both areas contain multiple hiding places so the cats can easily retreat if necessary.


For the first few nights, these territories should be inaccessible by the other cat. (Tip: read Bringing Home a Shelter Cat for a more in-depth guide on the pre-introduction stages).


2: Use large cardboard boxes with holes cut in two sides .The second hole allows the cat to escape if cornered by another cat. The boxes will come into play once you start allowing the cats to interact directly. Introduce the boxes first so that the cats become accustomed to using them. Cats like to hide in high places so remove fragile items from shelves or block access to the shelves.


3: Ensure adequate resources to reduce competition. Cats will get aggressive when they think there is competition over resources, so ensure there is plenty of water and food bowls, cat litter, toys and even keep your attention equal between cats to keep them all as happy as possible.


4: Place your new cat in his space as soon as he arrives home. Spend a minimum of one hour with him and the other cats in the household every day and play with them regularly.


Watch them closely for signs of stress or anxiety, such as hiding, aggressive behaviour, decreased appetite, and excessive vocalisation. If you see any of these signs, your cat could be suffering from stress. If any cat is showing mild signs of stress give them more time to acclimate to the new situation. If the signs persist for more than several days or if your cat stops eating, consult with your veterinarian.


  • Step 3: Slowly introduce


If all the cats appear comfortable in their spaces, place the new cat in a different room equipped with the same amenities. After two days allow your other cats to enter the new cat’s original territory. This will allow each cat to become accustomed to each other’s scent in a nonthreatening way. Allow the cats to acclimate to their new areas for one day.


Start allowing the cat’s closer access to each other by placing them on either side of a closed door so that they can smell each other directly.


The next step is to allow them to see each other through a baby gate or a door that is propped open a few centimetres. If the cats are interested in each other and seem comfortable, allow them to meet. Open the door to the rooms between the cats and observe them closely.


 If any cat shows signs of significant stress or aggression, separate them again and introduce them more slowly. 


Begin again by allowing them to sniff each other through a door. If the cats are not hissing at the door, bring each cat into a large room, on opposite sides. It is good to have two people so that the cats can be kept on separate sides of the room and played with or given treats. If you are alone, place the more comfortable cat in a cat carrier with a bowl of canned cat food to keep him occupied and play with the other cat. Over multiple sessions gradually bring the cats closer to each other. Over time the cats will learn that they are not a serious threat to each other.


cats for adoption northern rivers
Two of our shelter cats, Boots and Otter


​Alternative introduction: Cat pheromones


Another way to introduce cats to each other’s scent is by using their own pheromones. Cats have glands in their cheeks that produce pheromones, and when your cat rubs their cheek against a wall, chair or your leg, they produce pheromones which are chemical substances that can help to relieve anxiety and provide information about the cat that is producing those pheromones. Exposing each cat to towels that were gently rubbed on the new cat’s cheeks is a good way to introduce them.


Perhaps try both methods and let us know how it goes below!

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