Whenever I feed frozen food, I always target feed the corals and nems first. The fish get the left overs. LOL Something tells me they are not starving.
I figure if the corals don't want it, they wont eat it. If they do want it, well then they must like it. Am I wrong???? LOL
As for your nem splitting, I agree with Carey. Being happy or sad they can split. Mine Rose was getting huge all of the sudden. It was taking over the tank. Then it got very punny for about a week. Next thing I know, I had two.
Over course now my Green has decide he likes to explore. Never stays in one part of the tank for more than a day or two.