Dogs and cats are prone to developing the same types of dental diseases and problems as humans, including gingivitis, periodontal disease, tooth decay, staining and cavities. The process of dental decay and disease starts every time your pet eats. When your pet eats, food particles get on their teeth and gums. This fuels the bacteria in your pet’s mouth, causing an acid attack on the enamel of their teeth and creating a sticky, clear substance called plaque. If the plaque is left on teeth, it hardens into tartar. When plaque and tartar are left on your pet’s teeth for an extended period of time, it can lead to gingivitis, periodontal disease, cavities and oral infections.