Pop ? I really doubt it, unless it is diseased or something really weird is going on. I have a small school of zebras in my tank too, and there is a dominant fish that always tries to fight for the food. Once he gets his fill, he will continue trying to eat food, but it usually ends up coming back up. I would try dropping flakes on two different sides of the tank at the same time, that would give him a harder time hogging all the food.
