Try as I might, I feed for 3 little SAPs. One of them has a serious eating disorder and will eat for 4. That is the way it is here.. 1 eats all the food, the second gets some and the third (smallest) gets almost none.
I started with some snails and 2 ate.. the little guy didn't. Then I went to shrimp. The same situation; 2 ate the little guy didn't. So finally (because the little guy was seriously thin) I gave them some blood worms. They all ate!
Short of separating them I don't know how to break that pecking order. Anyway.. for future SAP keepers.. here is what you may or may not be dealing with:

