Cats, cats, cats

Today I dod a thing. Miss marbles started peeing outside the litter box when we started getting foster kittens. They like to invade her space. She became very unhappy and started marking. Xeays and test were negative. Anxiety meds did not help. I ended up isolating her in my sewing room and she has been fine since. I hate not being able to leave the door open and keeping her in a stuffy room. I am hoping this works. She will also be able to visit with other cats when the come around but her space remains hers.