Because of its unusual shape Sumo Play bounces in all sorts of unexpected directions. This creates a surprise effect which your do can’t resist. It stimulates his mental alertness and gives your dog some healthy exercise. Tip: You can fill the Sumo Play with treats which are challenging to remove to keep him busy and entertained during the time he has to stay alone at home. WARNING: Always supervise your pet when playing with pet toys. This product should be inspected periodically for damage. Do not permit your pet to continue playing with a toy that is broken or damaged. Please discard when worn. No pet toy is indestructible. Intended for pet use only. Keep out of reach of childern!