My cat's weird behavior.

[bif]

We have an indoor cat who's been spayed. She's 3-years old. This past week, there's been another cat hanging around our back door. Our cat turns into a monster. She starts hissing and growling. Even after we chase the cat away, she'll follow me around hissing and growling at me, with this demonic look in her eyes. It takes her about a half hour to return to normal.

Is this normal? Is there anything I can do to keep the other cat out of our yard?

[brewens]

1. I don't know about normal, but my cat has done that. She's older now so it's been a while. She would

go ballistic seeing another cat close to a window and stay in war kitty mode for a little while.

[3catwoman3]

2. A couple of our neighbors have cats that they allow out...

…and our one female tuxie, who is 11, and generally mild mannered, goes berserk. She lets loose with a combination meow/shriek that sounds like she’s getting a limb torn off. It’s such an alarming noise that I wish we could attach a recording of it to our house alarm system - if anyone was trying to break in, it would scare the hell out of them.

She will be rather growly at a much lower intensity, for a few minutes afterwards if one of the other 3 cats crosses her path.

[SarasotaDem]

7. Henrii

Is our 16YO male that does the same Exactly 7 times
Each time he goes out on the patio ..
Started when other cats roamed the yard

[ChazInAz]

8. I know THAT sound!

My Savannah Cat, Hastur The Unspeakable, used it on occasion. Any time the local feral cat Invader Zimm showed up in the yard, mooching, he'd go through a performance that made me think of a line from MacBeth..."When night's black agents to their preys do rouse".
He was positively apocalyptic!

[Walleye]

3. My cat is pretty friendly with the cat to come to my back door since they used to be outdoors together

But when he goes to the window in the bedroom, there used to be a group of feral cats living out there, and he always attacked me like it was my fault. He still reverts sometimes at that window even though the cats are gone. Cats are weird. But my back porch cat, who climbs up to my second floor deck, one of the kittens we had neutered and released years ago, he still hangs around.My indoor cat sometimes goes and sleeps by the door to be near him. It’s cute.

[Ocelot II]

4. Cats can be very territorial. Mine gets the same way when she sees

another cat in the yard, even though she's safe inside. She'll growl and fluff up, and occasionally has had the same kind of hissy fits you describe. If the other cat belongs to a neighbor maybe you could ask them to keep it inside? Or you could just yell at it and try to discourage it from hanging around your door. But your cat's behavior is normal because cat.

[PSPS]

5. LOL. Yes, it's normal.

I have a similar situation. My kitty likes to sit in the window. My yard is on a neighborhood cat's "constitutional" and, when he sees her in the window, he will just sit and stare at her. She gets annoyed. He will fling himself at the window which will cause her to growl and get a hilarious bottle brush tail. He eventually saunters off and my kitty settles down. In your case, your kitty will eventually get used to it and it won't bother her so much. LOL. Enjoy!

[El Mimbreno]

6. Seen this before...

Some cats can be extremely territorial. As far as her behavior toward you, I can only guess; maybe reaffirming her territory? Or her ownership of you?

[2naSalit]

10. Look of...

Frustration at not being able to go out there and kick that other cat's butt!

[Karadeniz]

9. Its normal. Try to put up a barrier to prevent her seeing the other cat. Her fear

could lead to her marking the territory where she sees the cat.

[jfz9580m]

11. Heh

I would be taken aback if any of my three cats behaved any other way.
It sounds like standard cat behavior. I wouldn't worry about it...

[Rebl2]

12. A few years ago

we had baby raccoons in the early summer and if we had the back door open, sometimes the babies would come up and my cat would see them. She seemed fascinated by them and never smacked the storm door like she would if it was another cat. Even if she sees another cat she has never turned on me if I scared it off.

[Sanity Claws]

13. Yes, normal territorial dispute

Just be glad that she is not an intact male. Males will often start spraying when in a territorial dispute.