Common causes of excessive thirst in Border Collies
- Diabetes mellitus
- Kidney disease
- Cushing's disease (hyperadrenocorticism)
- Urinary tract infection
- Certain medications (steroids, diuretics)
When it's an emergency
Take your Border Collie to a vet immediately if any of the following apply:
- Excessive thirst with frequent urination or accidents
- Weight loss despite normal appetite
- Lethargy, vomiting, or sweet-smelling breath
Safe home care steps
- Measure water intake over 24 hours and note it for the vet
- Do NOT restrict water — it can be dangerous
- Book a vet visit for bloodwork and urinalysis
Important: Home care is supportive only. If symptoms persist beyond 24–48 hours, consult a licensed veterinarian — AI guidance is not a substitute for professional diagnosis.
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Open Symptom CheckerFrequently Asked Questions
Sudden or dramatic increase in thirst (polydipsia) is often the first outward sign of endocrine or renal disease. Track how much your pet drinks over 24 hours — over 100 ml/kg is abnormal.