Exercise is just as important for diabetic dogs as it is for non-diabetic dogs.
Exercise utilises energy and helps to avoid hyperglycaemia. In addition, the increased blood flow produced by exercise may improve insulin absorption helping to further lower the blood glucose concentration.
The activity level of your diabetic dog should remain unchanged and regular. If a dog is suddenly very active (e.g. longer walks or excitement about visitors) it uses more glucose (energy). In diabetic dogs, this can result in very low blood sugar (glucose) levels. In fact, very low glucose levels can deprive the brain of energy and your dog could lose consciousness. If this happens, you will need to administer glucose immediately. See Hypoglycaemia.