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Why is my spayed cat anxious and aggressive when guests visit?

Updated On September 23rd, 2025

Pet's info: Cat | Siamese | Female | 1 year and 8 months old | 7.9 lbs

Dear, we have female siamesemix cat, almost two years old. She is very active and attached to us. But, when someone came to our home, she became very angry, anxious, and she starts growling and biting her tail. This stage could last for a day or two. we sterilized her when she was about 9-10 months old, and since then she slowly became more and more anxious. Before the sterilization she didn't behave this way in surrounding of other people. Could you give us some advice? Thanks in advance.

1 Answer

Most Helpful Answer

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Answered By Jessica Desrosiers

Veterinary Technician

Published on February 12th, 2017

It's possible Mica is feeling a little stressed, or is a bit under socialized. If the behavior happened suddenly or occurred after a surgery it is also a good idea to schedule a vet visit as behavior changes can sometimes indicate pain or illness. if Mica checks out healthy, you may need to practice some socialization skills. This includes making sure she has a place to hide/relax when people are over. if she does check out new people, have them toss a treat or play with a favorite toy such as a feather on a stick that can introduce positive interactions rather than attempting to chase or pet her. If there are other pets in the house causing stress, making sure she has access to food, water, litter and bedding without competing with other pets can also help to reduce stress. Pheromone diffusers in plug-in or collar form can also release a calming pheromone which can help with stress and anxiety. If the behavior continues it is also a good idea to talk with your vet or a veterinary behaviorist about a training plan that may include medication to help reduce anxiety while instilling calming behaviors.

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