Whenever my cat walks past the toilet she sticks her tail straight up and quivers it and also her back is humped up and also quivers. What does this mean?
Cats often do this when they are really pleased. I call it jiggly-tail-kitty....one of my cats does this whenever I come home and when she is just about to get a little tuna as a treat.
Also, this is what it looks like when a cat sprays. Have you noticed any urine when she does this?
And...it sure is odd that she only does it when she passes the toilet. Hmmmmmm......
Most often spayed cats do not spray...and males are more likely to spray than females. However, a spayed female might spray if she is under stress, feeling territorial, or sick. But, I think you would have noticed the urine if she is spraying. It would be on the walls or on the base of the toilet rather than on the floor.
Perhaps she does this when you are in the bathroom shaving or while you are otherwise occupied and she is happy about being able to be alone with you in the room. So, maybe she is being a jiggly-tail-kitty because she is happy to have you to herself in the bathroom!
Our new boy does this too. When I first saw hime do it I thought 'oh no, is he going to start spraying.' I still get nervous every time I see him do it. I grew up with a male cat who sprayed and I really didn't want a male cat, but my daughter seems to fall for the males. Must be teen hormones! He is neutered.
OMG!!!!!!!!!!!!! Tatyana does this too!!! when I am in/on the loo only!!! I think she is saying that she is happy I don't use her litter box!!! Or that she is pleased that I am toilet trained LMAO!!