Arrowana can be hesitant to change from one type of food to another. If you have been feeding them live foods, this can be a little more tricky. If you take a few Food Sticks and soak them in water for a few minutes, they will become pancake-like and also the smell will become stronger in the water. This will sometimes attract them and if they nudge it and notice the texture is not hard, they will go for it. You can also take a few Food Sticks and throw them at the water surface with some force to duplicate a live food going in, this also works well. Once the eat a few of the Food Sticks, they get it and feeding should get much easier going forward. Size can also play a part, if you have very large Arrowana, try using the Jumbo CarniSticks. Each stick has the caloric equivalent to one live goldfish.