Starting to brush your pup's teeth between the ages of eight and sixteen weeks is vital to the health of his teeth and starting out this early will make it much easier for him to get used to this daily activity. That’s right, you should be brushing your pup's teeth every day before bedtime, just like you do your own. Failure to do so may not result in cavities, but dogs can get potentially serious gum disease without proper dental care. It is up to you to prevent this from happening--your dog cannot brush his own teeth!
Chances are pretty good that your puppy has no concept of bad breath. Even he did, he probably wouldn’t care. The only time he might think about his mouth is if it starts to hurt when he chews or is painful all the time. The earlier you start working with him and a toothbrush, the less fuss he is likely to put up over time.
The sooner you start brushing your pup's teeth, the easier it will be to get him used to it. This is simply because young pups have not learned to object--they are far more accepting of new things. Keep your pup's teeth brushed on a daily basis, preferably at the same time every day. While he may not be able to get cavities, he can still lose his teeth to gum disease.