3 sizes of dog toothbrushes: Suitable for all Small Medium Large Dogs. Choose the right size based on the size of the dog. Made of high quality rubber, nontoxic ,durable, 360-degree bristle configuration, bite resistance and easy to clean Usage: Allow your dog to chew on the Brushing Stick for Dogs for about 10 minutes at a time. This is enough time to clean his teeth, but not so long that he ’ll get bored of it. When his or her 10 minutes are up, you should take the stick and put it up until next time. Effective Toothbrush For Dogs:Specially Tailored for All Kinds of Puppies,Dogs ??RELIEVE STRESS??Bite Resistant. Perfect for stuffing with treats; Unique treat-gripping design. Helps eliminate boredom and separation anxiety.EASY TO CLEAN. It can be washed ,no residual dirt, so that dogs chew more safe and hygienic.The design with different holes is suitable for dog's teeth in different directions.