When Cat Drinks a Lot of Water, It’s Usually a Symptom of Something More Serious

when cat drinks a lot of water

When cat drinks a lot of water, it is usually a symptom of something more serious. A cat may not be drinking enough water if it is on a dry food diet. In some cases, excessive drinking may be caused by other issues, such as high calcium levels in the body. There are also some other common reasons, including medication for diabetes and hyperthyroidism. Listed below are some of the most common causes of excessive thirst in cats.

Medications increase thirst

Increasing thirst in cats is a common symptom of a broader problem. Most cases of polydipsia result from the body’s need to replenish fluids lost through excessive urination. Some cats, however, may suffer from a more serious compulsion to drink – known as psychogenic polydipsia. Cats with psychogenic polydipsia are prone to compulsive behavior and are rare.


Almost all cats that suffer from hyperthyroidism have a benign tumor in their thyroid glands. The thyroid is a butterfly-shaped gland located in the neck and has one lobe on each side. Its job is to regulate the body’s metabolism, and excess thyroid hormones lead to an abnormally high metabolic rate, which negatively affects the cat’s organs.

Diabetes mellitus

A sedentary lifestyle can make your cat prone to diabetes. However, a cat with diabetes will also exhibit some behavioural changes. Among these changes are increased thirst and appetite. As a result, your cat may lose weight. Losing weight is always dangerous, no matter why. But a diabetic cat is more prone to developing diabetes than an overweight cat. If you’re restricting your cat’s diet, it’s highly likely that your cat will develop diabetes.

High calcium in cat’s body

Elevated calcium in the body of a cat is known as hypercalcemia. This condition can be caused by several factors, including an excess of water. High calcium levels may also be caused by an excess of salt. To determine if your cat is suffering from an elevated calcium level, a routine blood test is required. If the total calcium level is elevated, it is a sign of a more serious condition. Further testing is necessary.


While it is generally not a medical emergency, your cat might drink a great deal of water for no apparent reason. Besides warm weather and a dry diet, excessive water consumption can also be the result of more serious conditions, such as diabetes mellitus or liver failure. If your cat is showing signs of polydipsia, you should consult a veterinarian for a proper diagnosis.

Stress-related changes in drinking habits

Your cat’s drinking habits may be affected by stress, including moving, rearranging furniture, or the birth of a new baby. While your cat may have no underlying health condition, excessive drinking could be a sign of a serious ailment. If your cat seems to be drinking more than usual, seek medical attention immediately. Stress-related changes in drinking habits can be indicative of a broader problem, such as kidney failure.