Unfortunately I've tried that once. The other fish don't make it over to the other side before he does.
But that does give me an idea... Next feeding time, I think I'll be waiting with a net and try to scoop him up. I can keep him in the net while I feed the other fish.
you run the risk of stressing him if you net him every time you feed. i still say give it some more time. as a matter of fact you might even reduce your feedings. your other fish are not going to let him eat everything for long while they starve. they will eventually get the picture and get more aggressive at feeding time. if he were driving them off from the food that would be one thing, but if he is just quicker on the gun they will catch up when they get hungry enough.
J.