KONG Core Strength Ball Dog Toy, Large; KONG’s Core Strength Ball is specially designed with chewers in mind. This durable toy is built to bring dogs excitement, extended play time and plenty of chew time with its multilayered core. The extra layers in the center make this toy even tougher, while the textured exterior is designed to help encourage healthy gums and teeth as your pal chews. With interactive play like a friendly game of fetch, you’ll be able to strengthen the bond you have with your furry friend even further! Best of all, this toy comes in more than one size, so you can choose the right one for your pal.