A. Dogs rely on their teeth for all kinds of activities -- eating their food, chomping on chew toys, and playing. If you don't keep your dog's teeth in good condition, it's likely that they'll lose some teeth with age, which may prevent them from doing some of the things they love. Even if your dog doesn't lose teeth, they may suffer from cavities, abscesses, and gum disease, all of which can cause them discomfort. Not to mention, the cost of professional dental care that could be prevented by simply keeping your dog's teeth clean.