General rule of the thumb is 'no blood, no foul' but the marks on her face obviously were bleeding at some point. With fighting rats, you either separate them or spritz them with water to break them up so they go back to their usual business. If it's extreme aggression with blood and gashes, then you have to consider removing the aggressor entirely.

It could just be hormones. They can get pretty uppity when they're in heat, vice versa with out-of-heat does bothering does in heat.
I never had problems with females unless they were kept in a group of 2-4. When I took in a litter and combined the females with my 4 other unrelated females, they barely even squabbled. Also the names of your rats are stupid.

Your rat names are cringey af. Weeb names are worse than the Harry Potter ones.

>>2033172
>>2033174

Yeah, the names are kind of dumb, aren't they? I named one of my first girls after a DS9 character and I just sort of ended up with a theme. I used to have a friend who named all of hers after cheese; "Tyrolean" sound pretty cool when it's read out loud for the best in show. It's actually a reeking, mold encrusted cheese from Austria.

> It could just be hormones. They can get pretty uppity when they're in heat, vice versa with out-of-heat does bothering does in heat.

There is that. I don't keep bucks and I only desex if a new kitten is especially stroppy. Toshiko is definitely over sexed and does harass the other two. Hanako I can very rarely even tell if she is in heat, so when Toshiko tries to mount her, she's just confused and pissed off. Sawako's a middle to strong heat, but often she'll push off Toshiko even then. It's pretty weird though, the way their heats are so out of sync. This is the first time I've ever had girls who don't form the four carriage lesbian hump train whenever I have friends over.

>>2033191
Oh lord. My girls never did lesian hump trains. They would always push each other off. That must be fun with guests. Those cheese names are a pretty cute idea too.