The concave-convex groove and the serrated brush head automatically clean the teeth during the dog bite process! All convex particles help eliminate dental plaque and tartar and tartar difficult to reach! The production of food grade plastics: no dye added, food grade materials Instructions for use: 1. There are holes on the top of the toothbrush for (or attractive) pet toothpaste. 2. Press the pet toothpaste (or a food attraction) in the upper hole. 3. You can also apply pet toothpaste (or a food attraction) directly on the groove. 4. Pets mumble to teeth brushes under the stimulation of taste. This product helps animals clean their teeth in depth. Use the intention: 1. Let your dog bite and chew the toothbrush, no more than 10 minutes at a time. 2.10 minutes are enough to clean the teeth, not too long, otherwise it can get tired. 2. Excessive use will result in a new burden and a new pressure on the gums of the dog. Name: Dog Toothbrush Color: Green Size: Reference image Material: