Monster Ball Dog Toy With a wacky bounce and a rockin' look, the Monster Ball Toy from Jolly Pets(R) is hollow. Fill it with your dog's favorite treat for an over-the-top, monster-size good time. Features: Weighted for an irregular, unpredictable bounce that drives dogs crazy and keeps them busy longer than traditional ball toys Mouth opening is easy to fill (and makes getting to the good stuff a challenging blast for your dog) Cool Mohawk, goatee and teeth textures clean your dog's teeth and massage gums Non-toxic and completely dog safe Yummy vanilla scent Stands up to aggressive chewers Ideal for games of retrieval or hide-and-seek Item Specifications: Size: Small (2.5"DIA) Medium (3.5"DIA) Color: Blue Materials: Non-toxic rubber