Without treatment, it can lead to periodontitis, teeth loosening, bone loss, and ultimately, loss of teeth.Tooth fractures occur when Shih Tzu or any dog chew hard substances, such as hard rocks and cow hooves. your veterinarian for food recommendations that assist with tarter textures, with ridges and grooves for the dogs to work on while his rub your finger around the dogâs mouth. purchased for that purpose. There are several types of âbites.âThe following are signs that your dog may have a problem in his mouth or gastrointestinal system. As it continues, it can cause pain. Many dental toys are made of natural rope fibers that act as As a dog owner, you want to ensure that you purchase a dog food which is of high quality because this will provide your pet with enough nutrients he needs to stay healthy.