I have an 8" Speckled Bullhead with my bichirs (all upper jaw sp) and they're all fine. I just spread the food out so everyone gets some,and sometimes do a second, smaller feeding once the bullhead has gorged himself. He's really not as much of a pig as I expected him to be, but when he is in feeding mode, he doesn't fool around. In other words, just make sure the endli gets enough food with the bullhead.