My girlfriend has a blood parrot cichlid in my tank and she is the most dominate one in there(believe it or not!) with two smaller doviis. When I woke up this morning the blood parrot has a cut on her face and her tail seems to be shredded and it also looks like some scales are hanging on by a thread. Is this some type of fin and tail rot or are the doviis actually fighting back?! The two dovii are very submissive to her and I have yet to see them fight back. What's going on?