2 weeks ago i bought my first 2 senegal bichers. both were the same size length-wise and width-wise. they both eat a good variety (flakes from the other fish, shrip pellets, algea wafers and frozen bloodworms n mysis shrimp) both seem to eat their fair share too. one seems to eat more than the other n is gainin weight very well. the other tho is still pretty skinny... should i be concerned??