Hello Diedra, Thanks for asking such an important question. There are many reasons why dogs drink an excessive amount of water. Many times an increase in water intake is one of our first clues to the onset of a disease. If you think that your dog is drinking more water than usual you should make an appointment to see your veterinarian and they will likely want to check your dogs blood and urine. Some of the diseases that can cause increased thirst in dogs are kidney disease, liver disease, diabetes, and adrenal tumors. There is actually a formula used to… Read more »