Thank you for the information. I think your first observation was correct for my little horse. She is now eating very well and is now following the eye dropper to the feeding station. I also have abundant copepods and amphipods established in this tank. I do have air stone going in the sump tank. I stop all circulation during feeding time. Your are correct, the small horse seems to be more selective of size and eats the larger, more whole shrimp (I am feeding Hikari Mysis Shrimp). Just received my Vibrance 1 and 2, so will be adding that to their feeding also. Boy do I love these little guys and am very glad I set up this species tank especially for them. I guess I kind of panicked when the small one would not eat…..new daddy syndrome!!!!