4 out of 5 pets in the US experience by the age of 3. Tartar buildup can start in as little as 24 hours after your pet eats, so it's important to brush their teeth regularly. Dental disease can not only affect your pet's mouth, but it can also impact their heart, liver, and kidneys. Good dental health is important for your pet's overall health and well-being. By taking care of their teeth, you can help them live a happier and healthier life.