Regular exercise keeps dogs happy and healthy. The K9 Fitness by Zeus rope and TPR ball dumbbell will keep your dog engaged and entertained with a variety of stimulating textures. This unique toy combines rope, a tennis ball and TPR to entice your dog. Rope fibers help floss dogs teeth as they chew and play. Great for tug, fetch and a gentle chew. Additionally, dogs see shades of blue and yellow. The K9 Fitness by Zeus collection was particularly designed with that in mind. The toys blue and yellow colors can easily be located by your dog regardless of the environment they are playing in.