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Why is my cat suddenly aggressive towards people, biting & scratching?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Female | 2 years and 2 months old | 3 lbs

My 2 years old female cat who i've had since she was 7 weeks old has become aggressive towards other people in the house and visitors for no reason. My cat has attacked my sister till the point that she had about 4 holes in her arm where my cat had bit/scrarched her.she also hisses and growls towards visitors including adults and children.

1 Answer

Most Helpful Answer

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Answered By Amy Poole, DVM

Veterinarian

Published on January 1st, 2018

I'm so sorry to hear that Kitty seems to have a change in her behavior. I would be concerned that she may not be feeling well or potentially be in pain, causing her to be aggressive. I would recommend you take her to your veterinarian to have a full physical exam. There may be something physically wrong with her causing her to act out. If she is not spayed, I would also consider spaying her, as hormones can cause behavioral problems. If she is healthy and there is no underlying medical cause of her change in behavior, there may be something in her environment that is causing her stress. Sometimes environmental enrichment, like shelves, cat towers, etc, can help with behavior issues. Feline pheromones (Feliway) can also help some stressed cats and calm them. Finally, some cats do need to be put on behavior modification drugs, if the other previously discussed things are not the problem. You can discuss this with your veterinarian. Best of luck! I hope she is acting more friendly soon!

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