Kong Rewards Tinker Dog Toy Medium / LargeKONG Rewards Tinker randomly dispenses treats through holes in 6 different spots, increasing the irresistible unpredictability that keeps dogs riveted. Tinkering around with the toy moves kibbles through the tubes, releasing them as it rolls and bounces. Funnel makes it easy to fill with 1 cup of food for a mentally stimulating feast. Use for meals to help manage weight. Corners mute play for quieter action.