Drinking noticeably more in dogs: what to do
A sudden doubling of water intake (dogs over 100ml/kg/day) suggests diabetes, kidney disease or endocrine disorders.
What are the common causes?
Diabetes mellitus
See a vet within 24 hoursCommon in middle-aged, overweight dogs — the classic triad: increased drinking, urination and appetite with weight loss.
Cushing's syndrome (hyperadrenocorticism)
Monitor for 48 hoursChronically high cortisol — common in senior dogs: symmetrical hair loss + increased drinking + pot-belly.
Pyometra (uterine infection)
Emergency — go nowA post-heat emergency of unspayed females: the uterus fills with pus and toxins. The open form shows vulvar discharge; the closed form hides it and delays diagnosis. Spay surgery is the only cure.
Home care & observation tips
- ✓Log daily water intake and urination
- ✓Go for fasting blood glucose + urinalysis
- ✓Adjust diet; drop sugary treats
- ✓Log water intake (ml/kg/day)
- ✓Get endocrine screening at the vet
- ✓Never give human steroid medications
When must you see a vet?
- ⚠Increased drinking/urination for several days
- ⚠Vomiting, severe lethargy (possible ketoacidosis)
- ⚠Increased drinking + symmetrical hair loss together
- ⚠Signs appearing while on steroid medication
- ⚠Purulent vulvar discharge in an unspayed female
- ⚠Any combination of thirst + lethargy + bloated belly
FAQ
Is drinking noticeably more in dogs serious?
It depends on the combination of symptoms, how long it has lasted, and your pet's energy and appetite.Note that it can appear in problems that need prompt care, such as Diabetes mellitus, Pyometra (uterine infection). Enter the full symptom combination in our symptom checker for a more specific urgency assessment.
Can I monitor at home first? What should I watch?
If energy and appetite are normal with no other signs, 24-48 hours of monitoring is reasonable. Keep notes on frequency, duration, appetite, water intake, energy and what the stool/urine looks like — vets find this very useful.
What should I prepare before the clinic?
Note when the symptom started and how it changed; bring packaging or residue if ingestion is suspected; bring vaccination and deworming records; and if possible take a video (odd gait, cough sound) — clearer than describing.
Not sure how serious it is? Assess it with the symptom checker
Start symptom check →