I have two cats (girls) who are amazing. One is very lazy, and the other is a active. So I had some money and bought them a mouse toy that squeaks when it moves. (We have figured out how to make it stop squeaking also.) My active cat won't play with the toy or her sister. Her lazy sister does play with the toy.
My cats were always friends with each other. Why are they not now? These cats won't go near each other since I got the toy mouse.