You know, my two cats just had what I would call a face-off in my basement just now. And then a fight. Really just a tousle, I would say. You know those cats (two sisters), they get along so well. They sleep each night in each others' arms. But they do have conflicts. But they get along fine, which is rare, for cats. I know the lady who worked for me said she found cuts on the white one. I don't know. They may have been old wounds that were healing. And who knows how the cat got them. But they have to live together, my two cats. And they have to sort out these things on their own. When my father was alive, we had an orange cat, male. And he would beat up our effeminate other male cat. That seemed kind of unfair. But the effeminate cat died in 1999. And then orange one died in 2005, I believe. So that was long ago. I think the present two cats I have don't have a problem like that, though.
And where are the cat pics? Watch Jackson Galaxy in My Cat from Hell - Wikipedia His show is great and teaches how to create amenable spaces at home for cats. You just need to figure out why the cats were fighting, territory, food, litterbox, attention? Then make modifications if necessary.