He apparently only eats food if it's moving. When I fed him today, I dropped a minnow in front of him. He darted out to get it, but then it stopped moving. He was literally face-to-face with it, their noses all but touching, in the perfect position for an easy swallow, but he just stared at it perplexedly until it flopped again. Then he regained interest and caught it. Would using feeding tongs properly replicate the flip-flopping?