i have had two 6 month black onyx perculas for 2 weeks that were eating great at first even when one became more dominant not letting the other one get near the frogspawn. but now the dominance has changed and they seem to bicker over the food and not eat any or eat a little bit. is this normal and they will eventually eat again? ive been using garlic extrmeme and vita-chem in their mysis and brine shrimp. any suggestions?