Dogs can not eat for two days, but they cannot be without water for a day. If the water is short of 20%, it is life-threatening. Under normal circumstances, adult dogs need about 100 ml of water per kilogram of body weight per day, and young dogs need 150 ml of water per kilogram of body weight per day.

Water is an essential nutrient for dogs. Adult dogs contain about 60% water, and the proportion of young dogs is even higher. Water is an essential substance for dogs' metabolism. Only with the participation of water can the body's endocrine and cellular structure remain in normal state. In addition, the evaporation of water forms a heat exchange with the outside world through the body surface and the respiratory system, which can reduce body temperature. If nutrients are not dissolved in water, they cannot be fully absorbed, especially sick dogs, and they cannot recover their health if they lack water.

In addition, dog owners should increase their water consumption during high temperature seasons, after exercise, or when feeding dogs with drier feed. Drinking water should be supplied throughout the day and allowed to drink.