Always use a dog's dental kit. The kit usually includes a pet toothbrush, a finger toothbrush, and pet-specific toothpaste. Do not use human toothpaste because it can upset your pet's stomach.
Here are some tips that you should do regularly to prevent periodontal disease in dogs:
1. inspect the dog's gums and teeth. Healthy gums should look pink and should not be swelling. The teeth should not have any brownish tartar. Note if the gums are red or white, and if there is any bloody discharge or any loose teeth.
2. if the dog's breath is bad, it could be an indication of periodontal disease.
3. inspect the dog's mouth for any signs of cysts or tumors in the gums or tongue.
As you can see int the photo, Seamus and Stella are used to having their teeth brushed. Always praise your dog as you brush their teeth so they don't get scare.