Kong Bamboo Feeder Dumbbell. Twist open and fill with kibbles or treats and the irresistibly unpredictable way Kong Bamboo dispenses snacks hooks dogs into extended bouts of play that busies body and mind. Use for kibbles at mealtime to slow eating and help with weight management. A natural twist (and roll) on interactive dog toys the durable bamboo-infused material mutes noise for quieter play sessions.