cats can murder each other if their dislike or jealousy get to hate or resentment! but i had a bloodthirsty medicine cat murder a cat they only very slightly disliked (just a little less of one bar), so i guess it's also really rng
+ you can customize bordering clans in your current clan, you can go into your clan's json file (not the folder) in open data directory > saves, and rename your bordering clans