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How to introduce a new cat: Does age or size matter for my cat?

Updated On September 23rd, 2025

Pet's info: Cat | American Shorthair | Male | neutered | 5 years and 8 months old | 10 lbs

I would like to adopt a new kitten, but I'm afraid that my cat, Dusty, will be very upset and hate me and the new cat. My question is, how old should i get my new cat to make things a little easier on my cat? Should I get a kitten, or should I get a cat around his size? I know that I have to transition them into liking each other, and it won't be easy, but maybe the age of the new cat will help a bit?

1 Answer

Most Helpful Answer

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Answered By Susan England-Foster

Veterinarian

Published on November 30th, 2017

I do not think getting a certain weight or type of cat will make a difference with the interactions with your old cat. I would recommend keeping the cats separated at first. That way they can smell each other and even interact from under a door. Than you can start to slowly introduce them. I feel letting them decided how much interaction they have is the best step. I would recommend giving Dusty an area he can go the new kitten will not be allowed. Also remember to have 1 more litter box than cat and separate feeding areas. Sometimes it will take a while but most cats will get along eventually or even just avoid each other. I hope that helps

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