Many breeds of dogs are the result of human intervention. By selective breeding, the dogs have been made cuter. Very little dogs and pug-nosed dogs may have been bred too far into their specialty. The problem is with their teeth. It seems that their teeth have not decreased in size as much as their mouths, and when these teeth grow in, they come in all crooked. These crooked teeth trap food particles and eventually cause extreme decay and periodontal disease.
You can actually brush a dog’s teeth, and should, to help spare them the pain of mouth problems. To do it, start when the dog is quite young, and put your finger in their mouths and rub their teeth while playing with them. They will get used to this, and you can eventually substitute a toothbrush for your fingers. Don’t use human toothpaste, which is designed to be spit out. Use a small amount of baking soda.