My cat suddenly attacked me viciously. Why is he so aggressive?

Question

Do I need to worry about his aggressiveness? Boo Bear,cat, viciously attacked me last night, along with my mother. He bit deep into my thigh and scratched up my shin. We couldn't calm him down we had to put a laundry basket over him. And isolated him in our bathroom until this afternoon. He's been overly protective of us toward our house guests and has been following me around the house which he never usually does. Please we love BooBear want to know if I should worry that he'll attack me again. Pet's info: Cat | Mixed Breed | Male | unneutered | 1 year and 7 months old | 15 lbs

Dr. Melanie, BVSc MS · Accepted Answer

That must have been very scary for you! Yes, I would be very concerned about Boo Bear attacking you viciously, especially if this is out of character for him. I'm not sure what his vaccination status is, but (not to scare you but to put the fact out there), sudden aggressiveness can be a sign of rabies. If he isn't vaccinated against rabies and is allowed to go outdoors, then I would be concerned rabies is a possibility. I would take him into a vet immediately if he isn't vaccinated and allowed outdoors, and you should see a doctor as well as soon as possible. Cats have a lot of nasty bacteria in their mouth, and you can get a terrible infection from the bite. You need to be on antibiotics now to prevent this. Other causes of his sudden aggression could be hormone related (I see he isn't neutered and he could be acting territorially), or a medical illness such as pain, an injury, or systemic illness. If he is up to date on his rabies and isn't allowed outside, then I would take him to the vet first thing in the morning. He should be examined by a vet to make sure there isn't a medical cause behind this sudden aggressive behavior. If it is hormone related, then I would have him neutered to help with that.

My cat suddenly attacked me viciously. Why is he so aggressive?

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