Also consider that the apparent wound on the skin may not be the cause of the overzealous attention she's giving that area, but a result of it. She may be extremely stressed and the "OCD" behavior of over-cleaning that area could be a result of the stress.
Has anything been done in recent months that could cause an increase in stress for her? Such as:
- recently introduce any other cats, animals or newborn children into the household
- re-arrange her 'domain'/the living area unexpectedly
- change what you are feeding her or what her litter is composed of/different brand or style of litter
- edit to add: have any other pets died recently, or any family members who lived at home die or move out (could be grieving them no longer being around)
It could also be sympathetic anxiety. If you or your family have been exceptionally stressed lately, she would likely be picking up on it and it is affecting her as well.
Interesting you would say that. Including her, three cats are living here and she is the newcomer. My wife picked up her and her brother when they were young-ish but also kind of feral from a farm nearby. She kept them in a mid sized room with lots of playthings and plenty of food for three months or somesuch. We had many arguments about this but, as women do, she went through an unusually crazy phase of her life. (I call it 'Tuesday').
When I finally managed to free them, they were thoroughly nuts. What a surprise. My wife called them Maja and Wili. I called them Adolf and Blondi. Check my posts from back then, you'll find the last picture of poor ol' Adolf. My wife found him after a neighbor told her there was a dead cat next to the road. I got to bury him.
I love women and I love my wife in particular. But sometimes... To the moon, Alice!
AHEM! In case this message reaches you, Disregard all of the above.
That makes me sad. That seems like your wife essentially took her from having free roam of the entire outdoors and everything she was familiar with and then locked her up in a 'tiny' prison (comparable to the outdoors she previously roamed) where nothing inside was anything like what it was familiar with, and she was locked in there for 3 months, then she was introduced again into your greater house space. I'm not surprised that she's neurotically tearing her tail fur out.
The way to hell is plastered with good intentions. Don't know what else to say. Today is her seventh round of Chemo. Some would say "I'll kill the doctor that spiked her."
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