One of 9 boys I took in yesterday.
6 of them are going to be fostered by a friend of mine, and the 3 with 'issues' are staying with me as permanent residents.

This is Stylo, he has one eye. The owner claims it has been there since birth.
All these lads have mites, and haven't had a brilliant diet, so their coats are a little rough. They were well loved, though.

My three boys, Stylo, Lord Flashheart and Otis, have all been kept separate from one another as the owner said they fight. They don't, and haven't since being here.
You can tell the difference, though, between my 3 who have all lived alone, and the other 6 who are in a bonded group.
My 3 are skinnier, less muscle, more nervous, more depressed, and not coping with the big changes half as well as the lads in the group.

I do wish people would learn what is serious rat fighting and what is normal, and stop pulling rats out of their groups and housing them alone based on one little scuffle. Rats can't sit and have a conversation about hierarchy, like we could, they show it by posturing and having little scuffles.
When people whip a rat out of the cage as the first sign of drama, they're just prolonging the process, confusing the rats, and not allowing them to do what they naturally do.