Our pet toothbrush pens contain deionized water, plant extracts, peppermint extracts. It can protect your pet's sensitive mouth, effectively clean tartar and prevent bad breath. Deeply nourishes gums, promotes oral health and reduces periodontal problems. Its use method is very simple: 1. Turn the toothbrush to extract the oil from the surface of the teeth. 2. Clean your pet's teeth with a toothbrush. After 3 minutes, use a toothbrush to slowly remove the dirt from your pet's teeth. 3. Reapply with a toothbrush to protect the surface of your pet's teeth. Long-term use is better and keeps your breath fresh.