epsom salts and stop feeding them so much, and feed them a lower protein/higher vegetable based diet. NLS is only 36% protein where most are like 42%, try that or a diet really high in spirulina.
the dominant males are probably going first because they are fighting for the lions share of the food.
you could also try feeding less but more often. i feed mine 3-4x a day but only what they can eat in 30 seconds to a minute.
hope this helps, and good luck. sorry i cant recommend medications i dont know much about clout as ive never used/purchased/needed it. but according this it is a good treatment for bloat
How to avoid and cure Malawi Bloat. - AllCichlids.com - The #1 Resource for Cichlid Information