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Reintroducing littermates… after years. Complicated!
I’ve got a cat-on-cat aggression problem. I’ve read the cats.com article on cat aggression, and all of the factors it suggests seem either inapplicable or uncontrollable. I’m writing to see if anyone has additional suggestions or insights before I look for professional help.
Squeak and Sylvie are littermates. When they were young adults, Sylvie pulled a stunt that endangered her own life and also put my wife at risk of serious injury. My wife then exiled her to an empty bedroom, where she lived in the company of one of our other cats, Lady May, for years.
Late in 2023 my wife died. Early in 2024 Lady May died. After a while I decided that I had to get Sylvie out of that room, where she now was alone except when I came in to feed her twice a day. She’s almost 15 years old, and sooner or later she’s going to get sick and die. I don’t want her to do that alone in a room.
I knew I couldn’t make the change quickly because of an incident that happened a few years before: at my wife’s urging, I took Sylvie and Lady May into our master bedroom to get them used to being in other parts of the house. Lady May was OK with it; Sylvie was terrified. She hid under the bed, and I couldn’t get her out for a half hour.
Therefore I followed a gradual program. First I put a baby gate up in Sylvie’s room’s doorway and left the door open for short periods. I lengthened the periods until the door was open from the start of breakfast to bedtime. Then I started taking the gate away for short periods, which I gradually lengthened. Finally I left the doorway open from the time Sylvie finished her breakfast until I fed her dinner.
Early in this process Sylvie started coming out… at first just a few feet away from the door, but she extended her range until she was spending some time in my office (formerly the terrifying bedroom). She’s there right now, lounging on my desk and nudging my hand as I type. Typically she’s accompanied by Squeak (who is lounging on a second desk chair), me, and sometimes another one of my cats, Micro.
A few weeks after I reached this stage, the aggression problem began. Every few days my attention is attracted by growling, punctuated by yowls. Squeak chases Sylvie out of the office and back into her own room, corners her, and crouches there, growling. I haven’t seen any evidence of physical conflict, but I’d be surprised if there hasn’t been some.
Now, what is going on?
Too-sudden introduction? Not given the baby gate protocol I described. Squeak showed no signs of agitation through the whole process. Also, when I added Micro to the household last year I did it much more rapidly, and had no problems.
Inadequate socialization? Squeak has been living in a multi-cat household her whole life, and has no history of aggression. You could make a good case for Sylvie being inadequately socialized, but she isn’t the aggressor. (There was a little aggression between Sylvie and Micro, but it resolved itself quickly. Typically Sylvie would approach Micro saying hi, let’s be friends, but didn’t respect Micro’s boundaries and didn’t get the hint when Micro asked her nicely to back off. Eventually Micro hissed, Sylvie backed off, and that was that.)
Too many cats in too little space? Not counting Sylvie and Sylvie’s room, at one point we had six cats in the same amount of space where I now have three, with no problems. The house is pretty big.
Territoriality? That would explain Squeak chasing Sylvie out of my office, but then she chases her into her own room — her territory — and stands there growling. And it doesn’t explain why Squeak has no problem sharing space with Micro, or — usually — with Sylvie.
Competition for food? Not possible. When I feed the cats, all but Squeak are separately confined. Conflict or no, I don’t want them eating each others’ food.
Feeling threatened or distressed by the presence of a new cat? Why? Again, there’s no sign that Micro caused Squeak any distress, and nothing in Squeak’s history suggests that she feels threatened by other cats, or by anything else. (She’s a tortie. Torties don’t get upset, they get their way.)
I wonder whether Sylvie smells like a competitor because, being a littermate, she smells too much like Squeak.
I wonder whether I can solve the problem with Felaway, even without knowing what it is.
I wonder whether anyone else has ideas.
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