Does the cat hierarchy ever settle
So I was wondering... does the hierarchy in a multi cat household ever settle or is it constantly changing?
Last November we got our first cat Sophie who was 3 months at the time. Two weeks later we adopted her cage mate from the rescue, Anna, who was 4 months old. Sophie from the get go was top cat. There were no fights or anything but anna would always follow sophie's lead. Maybe because sophie was there first? I don't know. Anyways, in April we got our 6 year old ex queen/show cat, Sasha. After she became settled she was immediately boss because she was older and kept putting the younger ones in their place. Sophie was second in command and poor Anna was still bottom.
Fast forward to July when we moved into our new house. Everything was the same until we discovered the neighbour's cat was out all the time(the situation didn't end well and we ended up taking him to a shelter). Anna suddenly became super territorial, dominant and protective of me and the other cats. If the door was open and the screen was shut, she would try to break through the screen to kill him if me or the other cats where there(he frequently hung out on the porch). This continued for sometime and she became more and more dominant. That cat is now gone but she is still like this. She has moved from the bottom to top cat, Sasha is second and sophie is now at the bottom.
Is the hierarchy finally settled or will it change again at some point?