We have an older cat who almost never leaves the house. Our house is fenced but open, if you go to the kitchen during rain you'll get wet. So occasionally other cats turn up in our living room.

Usually they growl at each other and then the other cat leaves. This repeats for a few nights and then they don't come any more. The other day there was screaming and I found pee on the kitchen floor, although I didn't witness how it got there.

Now I wonder, when I see them growling at each other, should I rather clap my hands and chase the other cat away or let them negotiate on their own? Is there a risk that our cat might lose her territory and feel forced to move out?

  • 1
    Do not make a sudden, loud noises where your cat can’t see it. If he takes his eyes off the intruder, that may cause an attack instead of prevent it.
    – StephenS
    Aug 27 '20 at 23:03
  • It looks like some mating ritual is going on, according to the explanation. The peeing can be related to the marking of the territory. Of course, not seeing / hearing things, it is difficult to make a good estimation of what is going on.
    – virolino
    Aug 28 '20 at 5:25

Do not actively help the cat. Clapping or chasing can lead to aggression as both parties are surprised.

As it sounds, there is easy access to your living room. Your cat probably considers this to be her home territory (as opposed to hunting range or wander territory) and will aggressively defend it. Perhaps better option in this case is restricting other cats access to the living room, although your description of the housing arrangement is slightly confusing to me.

If restricting the access is not possible, alternative is to slowly enter the view between the cats, so that your cat doesn't lose the sight on the opposing cat, and shoo the intruder away. Actively chasing them won't really help. Your cat might pee on things to mark them against future intruders.

As said, best option would be to make access the house harder for the other cats, rather than attempt to drive the others away. By the sound of things there are new cats around that are establishing their own territories and your older cat is holding onto their own. Cats are very unlikely to abandon what they consider "home".

  • It basically works like this house, just much smaller and less fancy. :) Restricting access for other cats appears difficult.
    – AndreKR
    Aug 28 '20 at 15:34
  • Yeah, best option is to just keep eye on this and slowly shoo away other cats. Sudden moves or loud noises have a chance to trigger aggression if one of the cats thinks it's being attacked
    – Mandemon
    Aug 28 '20 at 15:56

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