Water is essential for pets. The American Kennel Club says water lubricates joints, facilitates digestion, regulates body temperature, and cushions internal organs, among many other functions. Similar to humans, pets that fail to consume enough water can face dire consequences.

Dehydration refers to when the body loses more fluid than it takes in, which can occur at any time, but more commonly during warm weather. Dogs can become very sick from dehydration. Symptoms of mild dehydration include a dry nose and excessive drooling; fatigue; and sticky gums.

As a dog becomes more dehydrated, symptoms can include loss of skin elasticity; loss of appetite; thickening of the dog’s saliva, gums go from sticky to dry; excessive panting; vomiting or diarrhea. Since dehydration causes the body to redistribute fluid lost, fluid may be pulled from the eyes, causing the eyes to appear sunken.

If a dog appears to be dehydrated, you can start offering small amounts of water to slowly rehydrate the animal. It’s important to call the veterinarian and get further advice regarding how to address dehydration. Some vets may suggest offering an electrolyte-enhanced fluid like Pedialyte, so electrolyte loss does not affect organs. The vet may want you to come into the office so the dog can receive intravenous fluids, says the American Kennel Club.

The best way to treat dehydration is to prevent it in the first place. Provide dogs with a constant supply of clean, clear water at all times. The amount of water needs to increase if the dog is spending time outdoors in hot weather or exercising.

Cats also are prone to dehydration and can exhibit the same symptoms as dogs. Cat owners also must be diligent in checking for dehydration symptoms in their pets.