Don't worry about it. All of my fish grow a stomach within a couple of weeks of me having them... Let's just say that they aren't starved. I'm afraid that if my Sun Cat keeps wedging itself between my slate it won't be able to get out...
They stay in a pack, and bandit the less marbled one chases the other marbled one wuth the black eye away, but he just comes back to the group. But they all sleep together