The average dog sleeps for about 12 to 14 hours per 24-hour cycle. Thatâs just the beginning, though. Puppies, who expend a lot of energy exploring and learning may need as much as 18 to 20 hours.
Although individual differences exist, the list below can provide some common hunger symptoms: 1  Feeling of emptiness in stomach. 2  Gurgling, rumbling or growling in stomach. 3  Dizziness, faintness or light-headedness. 4  Headache. Irritability, easily agitated.  Lack of 1  concentration. Nausea.
Health Conditions, Vitamins and Hunger. Although most vitamins won't cause you to feel hungry if you're healthy, people with certain conditions may experience this effect. One of the side effects of certain vitamin deficiencies is a loss of appetite. If you have such a vitamin deficiency and then begin taking vitamins to correct it, you might feel hungrier because you're no longer experiencing a loss of appetite because of the deficiency.