Your dog’s mouth can be infected with a bacteria called periodontitis. Usually, you won’t see any obvious signs or symptoms of this silent disease until it reaches its advanced stages, but gum disease can cause gum erosion, chronic pain, tooth loss and bone loss. Supporting structures of teeth can be weakened or lost. When food and bacteria accumulate along the gums and are not brushed away, they can develop into plaque, which hardens into calculus known as tartar. This results in inflammation and irritation of the gums (gingivitis), and is an early stage of gum disease. In the second stage, the attachment between teeth and gums breaks down, which intensifies in stage three and evolves into advanced periodontal disease in the fourth stage. Here you’ll see gum tissue recede, and loss of 50% of the attachment between teeth and gums. Tooth roots can become exposed. Bacteria builds up in a dog’s mouth and can eventually develop into plaque, which when combined with other minerals, hardens within two to three days.