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How do I introduce a new cat to my existing cat so they get along?

Updated On September 23rd, 2025

I’m considering adopting a new cat. I already have one, how do I make sure both get along?

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1 Answer

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Answered By Christie Long, DVM

Veterinarian, Certified Veterinary Acupuncturist

Published on June 1st, 2018

Adding a new cat to your home can be a lot of fun, but can be stressful both for you and for your current cat. Unfortunately, there is never a guarantee that both cats will become best buds or even tolerate one another very well. However, you can take some steps to slowly introduce a new cat to your home to ease the transition and make it as low-stress as possible for both cats. Prior to bringing home your new cat, consider using calming pheromones such as the [Comfort Zone® Calming Diffuser](). Also, be sure that both cats have been spayed or neutered to eliminate hormone-influenced aggression issues. Initially, keep the new cat isolated in a separate room (oftentimes a spare bedroom or the bathroom works well), allowing the cats to smell and paw at one another under the door. After a few days of this introduction, allow the cats to explore each other’s space for a few hours. In another day or so, allow them to see one another with an exposed barrier between them (i.e. a crate, screen door, etc.). If all seems to be going well introducing both cats, allow them to meet in an open room with plenty of supervision. Be sure that both cats have a way to leave the room should they feel stressed or threatened. Continue supervising all contact for at least a few days, possibly a few weeks, to assure that all goes well.

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