try the same feeding for a few days & see what happens, i have found them to be really hardy, easy to keep fish so most times its better to look at the simpler cause of a problem rather than something that you can't really confirm for sure. I really don't like the idea of throwing in meds without proper cause, people will say "yeah it's fine" but do we really know for sure & anyway, in the lake they will die so IMO it's best to try to keep things as natural as possible within reason. the only fish i have ever lost have been due to my own mistakes not illness or attack from others.
I feed a few types of food to my africans & feed them morning & night. When i feed there is always food left on the bottom for up to half an hour after, i have found them to be "slowish eaters" especially with the hard sinking sticks as they have to crush it up & they will spit & re-eat a few times.
i feed mainly jbl novorift sinking sticks, jbl novovert & sera granugreen. they also get sushi wrap, shelled peas, beans & blood worms on the weekends. this includes my tropheus which are supposed to be the worst for bloat & i have never had a bloat case in any fish.