yeah thats true, it can change... Muffin was always "boss", then she got to where she just wanted away from the other cats, so her and Callie would stay in one part of the house away from the others, callie always had to be separated. Muffin came out to the rest of the house some of the time... and then Emma would bug her so she would want back in her part of the house again.. one day though, Muffin chased Emma into the bathroom, I saw that she cornered her and was batting at her! Emma was cowering! I don't know what happend but obviously Emma has gone too far, Muffin is pretty mild but Em must have pushed her too far, oh the wrath of Muffin!