The LIFEIN Dog Chew Toy is designed as a tool to clean your dog’s teeth by itself. You could put some of their food kibble, toothpaste, peanut butter, mashed potatoes , pumpkin puree, etc. all along the mid lines to attract your puppies to bite, then the serration will effectively grind their teeth, so it helps them control tartar and plaque growth, promote your dog’s strong jaws protect them from oral diseases.