About 4 days ago i got 2 new rotkeil severums one about 9" and the other about 8" they both came from the same place and seem to be very healthy. The problem is they wont eat, its been 4 days so far and i have not seen them eat anything. Iv offered a couple differnt size pellets, beef heart, cichlid delight, frozen blood worms, and some cucumber and zucchini. Are there any tricks that anyone has used with success? All water parameters are right and the tank has been set up for years. Thanks