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On average, dogs require about 30 ml. (1.01 ounces) of water per pound of weight every 24 hours. If you’re concerned about the amount of water your dog is drinking, measure how much she’s drinking and compare that to the average. If her water intake isn’t in the “normal” range, then a trip to the vet is a must. According to Old Dog Care Guide
Drinking excessive amounts of water is often a sign of an underlying medical problem. Three of the more serious medical problems that cause a dog to drink excessive amounts of water include kidney failure, diabetes, and Cushing’s disease.
1. Kidney failure
The kidneys are the organs responsible for filtering waste materials produced by the body. When kidney failure occurs, the kidneys are unable to hold on to their water-concentrating ability. As a result, there is a loss of excess water via the urine. To compensate for this loss, the body sends out the appropriate signals that trigger an increase in water intake.
Canine diabetes occurs when glucose levels in the blood shoot past normal. Just like in humans, drinking too much water is one of the first signs of diabetes. When you find yourself asking
3. Cushing’s disease
Cushing’s disease is a disease with hormonal causes. This takes place when the adrenal glands—the glands in charge of growth and development, stress-dealing ability, and kidney function—produce an excessive amount of cortisol. Too much cortisol leads to significant water loss through urination, which, in turn, leads to an increase in water intake.
One other cause of drinking excessive amounts of water is if your dog is taking prednisone for an ailment. One of the side effects of prednisone is a need to drink more water. If your old pooch isn’t on this prescription drug and is drinking what seems like a lot of water, your best bet is to work with your vet to rule out any of these diseases as the culprit.