I'm having the same problem too!! My dalmation molly keeps chasing my balloon bellied molly away whenever I feed them anything, especially brine shrimp. Anyway, I suppose there's really nothing you can do with the bullies expect perhaps, as geoffrey22 said, scatter the food in different places. I'm just going to buy a bigger tank, a ten gallon maybe, with like a divider in the middle...? so each fish has five gallons to herself? I don't know. Anyway, keep us updated!!