6. Extreme Fatigue

A vomiting dog will have less energy and be less active even if the condition is not serious. However, when a dog is actively dying, he will show signs of extreme fatigue. He will most likely lie in one spot without attempting to get up anymore, and he may no longer even have the strength to lift his head. Again, this tends to be a slow decline and may be due to anemia, poor circulation or lack of energy. If his gums go white instead of pink, this can indicate anemia, which is a serious sign. Likewise, if his gums are pink but when pressed with a finger go white and stay white for several seconds, this is a sign of circulatory collapse which is a precursor to death.