Maintaining your senior dog's smile is one of the most important things you can do to take care of your its overall health. Just like humans, senior dog's teeth should be brushed on a regular basis to help stave off tooth decay and prevent gum disease. After your children brush their teeth at night, have them watch you brush your dog's chops too. If they're old enough, let them help. If you have more than one child, have them take turns. This will teach them responsibility and the power of a sterling smile.