Mouse's owner passed away and she is looking for a new home. Mouse is understandably finding her new life changes challenging but is slowly but surely opening up to making new human friends. Although she could just be figuring out that the nicer she is to people the more cat treats she gets!
Mouse is ok with other cats as long as they keep their distance. She spends most of her time on the cat post and is happy to keep to her own space. She occasionally goes for a walk through the office and only gets upset with the other cats if they get too close to her or block her path. If your other cat was passive and non-reactive she would likely be fine. So far she is all talk and stops as soon as they move or I move them.
Mouse is spayed and has been great about using her litter box.
Mouse is a senior girl and does have early stage kidney disease and requires daily medication.