you can go to your local vet and get some. petsmart works too. you can ask the ppl up front about wich one would work best with your breed of dog. if you have a small dog, it is nessecery to brush teeth, because they get teeth problems much easier. its good to brush the teeth anyway because it prevents diseases and cancers in the mouth. (which can be fatal) ALSO raw hide bones work good too. some dogs cant handle those so the brand GREENIES bones work well too.