Why is My Dog so Thirsty? Causes of Excessive Thirst in Canines


Do you find yourself hearing the unmistakable flap of your dog’s tongue in the toilet bowl far more often than ever before? Are there trails of perfect doggy drool everywhere, leading most notably, to the water dish? Are you unable to leave a glass of water on the table? You, my friend, have a dog with excessive thirst, otherwise known as Canine Polydipsia. As annoying as a dog that just can’t get enough water can be, this issue may not be behavioral, but medical. There are many causes of excessive thirst in dogs, some of which are serious.

First off, how much water is excessive for a dog?
The average dog needs 20-70 ml of water per pound of their body weight a day (example/ My 150 lb malamute requires 3,000 to 10,500 ml of water a day). To give you a rough idea of how much that is, one cup equates to around 237 ml. (In my example, that would be 13-40 cups of water!) I would increase this amount on hot summer day or after rigorous exercise.

Nobody knows your dog better than you, you likely will notice when your dogs thirst becomes excessive without measuring daily intake, but knowing what’s healthy is helpful information none the less.

Why is my dog so thirsty?

Some causes of excessive thirst include:

-Kidney Failure
-High blood calcium
-Uterine infection
-Diabetes mellitus
-Abnormality of the pituitary gland
-Kidney or Kidney tubules abnormalities or defects
-Kidney infection
-Over or Under activity of the adrenal glands
-Urinary tract blockage or defect
-Electrolyte imbalance
-Liver disease
-Behavioral problems causing excessive drinking even when not thirsty
-Heat
-Excessive activity
Miscellaneous disorders (that’s helpful)

As you can see the list of causes for excessive thirst in dogs is rather extensive and varied, it could be you have an ornery dog, a dog whose just far too hot, or your dog’s kidney’s could be failing (kidney failure is one of the main causes of Polydipsia). It’s hard to say based just on excessive thirst.

The best way to determine why your dog is so thirsty is to first monitor the dog for a day or two. See if the condition doesn’t change with environmental differences (heat), attention, (more common in puppies) or time. If nothing changes, you should take your dog to the vet for further testing to ensure the cause is not physical. In the mean-time, keep the toilet seat down.

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