What Causes Diarrhea in Cats?
Diarrhea in cats can result from minor diet upset or serious disease. This guide explains common causes, red flags, and when loose stool needs urgent care.
Diarrhea describes stool that is softer, more watery, or more frequent than your cat's normal pattern. One isolated loose stool is different from repeated diarrhea that causes dehydration or weight loss.
Common Causes of Diarrhea in Cats
| Cause | Typical pattern | |------|---| | Sudden diet change | Starts soon after new food or treats | | Food intolerance | Recurrent loose stool with certain foods | | Parasites | Intermittent diarrhea, mucus, poor weight gain | | Infection | Acute diarrhea, sometimes with fever | | Inflammatory bowel disease | Chronic or waxing/waning signs | | Chronic disease | May include appetite, weight, or hydration changes |
Normal vs Emergency
A short mild episode can be monitored if your cat remains bright, hydrated, and eating.
Kittens, seniors, and cats with chronic conditions can dehydrate quickly and should be assessed earlier.
Could Kidney Disease Be Related?
Chronic kidney disease more often presents with thirst changes, weight loss, and vomiting than diarrhea, but CKD cats can still have GI flare-ups. If your cat has kidney risk factors, review disease-ckd and ask your veterinarian whether blood and urine testing is due.
What To Do at Home First
- Offer fresh water and monitor intake.
- Feed bland, vet-approved diet guidance if instructed.
- Keep a stool log (frequency, consistency, blood/mucus).
- Bring a fresh stool sample to your appointment.
Do not give anti-diarrheal human medications unless prescribed by your veterinarian.
Common Questions
More in This Category
Can Cats Cough?
Cats can cough, but repeated coughing is not normal and can indicate asthma, airway inflammation, infection, heart or lung disease, or other conditions needing veterinary care.
Why Do Cats Drool?
Cat drooling can be normal in brief, relaxed moments, but persistent or sudden drooling often signals oral pain, nausea, toxins, or other illness that needs veterinary evaluation.
Why Are My Cat's Ears Hot?
Cat ears can feel warm or cool depending on environment and blood flow. This guide explains normal ear temperature changes versus signs of fever, ear inflammation, or circulation issues that need care.
Can Cats Fart?
Cats do fart, and occasional gas can be normal. Frequent, foul-smelling flatulence or gas with diarrhea, vomiting, or weight loss usually indicates digestive upset that should be evaluated.
Do Cats Snore?
Cats can snore, and mild occasional snoring may be normal. New, loud, or worsening snoring can signal airway inflammation, obesity, nasal disease, or other conditions that need veterinary care.
Why Do Cats Throw Up?
Cats throw up for many reasons, from harmless hairballs to urgent illness. This guide explains what can be normal, what is not, and when vomiting needs same-day veterinary care.
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Chronic Kidney Disease in Cats
Chronic kidney disease (CKD) is one of the most common progressive conditions in cats, especially seniors and breeds like the Persian. This entry covers symptoms, staging, diagnosis, treatment, and prognosis.
Can Cats Cough?
Cats can cough, but repeated coughing is not normal and can indicate asthma, airway inflammation, infection, heart or lung disease, or other conditions needing veterinary care.
Why Do Cats Drool?
Cat drooling can be normal in brief, relaxed moments, but persistent or sudden drooling often signals oral pain, nausea, toxins, or other illness that needs veterinary evaluation.
Why Are My Cat's Ears Hot?
Cat ears can feel warm or cool depending on environment and blood flow. This guide explains normal ear temperature changes versus signs of fever, ear inflammation, or circulation issues that need care.
Can Cats Fart?
Cats do fart, and occasional gas can be normal. Frequent, foul-smelling flatulence or gas with diarrhea, vomiting, or weight loss usually indicates digestive upset that should be evaluated.
Do Cats Snore?
Cats can snore, and mild occasional snoring may be normal. New, loud, or worsening snoring can signal airway inflammation, obesity, nasal disease, or other conditions that need veterinary care.
Why Do Cats Throw Up?
Cats throw up for many reasons, from harmless hairballs to urgent illness. This guide explains what can be normal, what is not, and when vomiting needs same-day veterinary care.
Can Cats Get Sick?
Cats can absolutely get sick, and early signs are often subtle. This guide helps you separate mild changes from urgent warning signs and explains when to seek veterinary care quickly.
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Sources & Citations
- Diarrhea in Cats (opens in new tab) — VCA Animal Hospitals
- IRIS Guidelines for CKD Management (opens in new tab) — International Renal Interest Society
- Cornell Feline Health Center (opens in new tab) — Cornell University College of Veterinary Medicine