The normal blood-sugar, or glucose, level for a canine is between 75 and 100 milligrams per decilitre (mg/dL), according to PetMD.com. The measurement indicates that, for every tenth of a litre of blood, there are between 75 to 100 milligrams of glucose present. Diet, age, naturally occurring hormones and disease may also affect the levels of glucose in a dog's blood.
Home tests such as Alpha Trak are specifically designed to monitor a dog's glucose levels. Common symptoms of abnormal glucose levels in a dog include bloodshot eyes, excessive hunger and thirst, lethargy and wounds that fester.
At certain times, such as after rigorous exercise, after a meal or during great stress, levels of glucose in a dog's bloodstream naturally and temporarily rise. A veterinary professional should conduct a full blood profile and urinalysis before any diagnosis or prescription of treatment for high blood sugar levels.
Pancreatitis, or inflammation of the pancreas, results in a dog's inability to produce insulin, a hormone which helps stabilize the level of glucose in the dog's blood. It is one example of many afflictions which may cause a dog's blood-sugar level to be dangerously high. Others include infections, the dog's age and, in some cases, the dog's size.