The photo on the left is our new kitten (odie) and the photo on the right is the resident cat (Luna) Now Luna use to be the most loving and affectionate cat I’ve met. She always demanded attention wanting to be stroked ect. Untill yesterday. We got odie and ever since then Luna hasn’t been herself she hides sleeps all day and night and she has turned very aggressive some time’s when odie is in another room Luna will come for attention but as soon as

Updated On November 10th, 2019

Pet's info: Cat | Mixed Breed | Female | spayed

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Answered By Dr. Melanie, BVSc MS

Veterinarian

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Getting a new kitten into the house is stressful for the existing cat, and that is likely why Luna is acting this way. I would slowly introduce them to each other. Take Odie, and put him in his own room with his own food, water, and litter box. Keep the door closed, and for a few days, feed them both treats on other side of door so they associate each other's smell with a good experience. Then let Luna in Odie's room while he is in a cat carrier. They can smell each other, but not be in contact. If either becomes upset or show signs of aggression, remove Luna from the room, and try again later. Praise them when they interact appropriately. When they are interacting well with each other through the carrier, you can let Odie out of his room, and see how he interacts with Luna. Praise them when they interact appropriately, and separate them with any sign of aggression or upset. I would get a cat tree with lots of shelves to give the cats vertical space to get away from each other. I would keep Odie in his room when you go out until they are comfortable with each other. I hope this helps!

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