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Constipation in cats

Quick answer

**Occasional firm stools are common**, but straining without passing stool for **over 48 hours** needs a vet. Obese, senior, and arthritic cats are at higher risk. Repeated constipation can lead to **megacolon** — a stretched, weak colon that is harder to treat. Vomiting with constipation is urgent.

Key takeaways

  • Yes — hydration supports normal stool. Many vets recommend increasing moisture through wet food, fountains, or broth added to meals as part of a management plan.
  • Large hairballs can contribute to blockage, especially in long-haired cats. Regular grooming and hairball diets may help — ask your vet if constipation recurs.
  • Plain cooked pumpkin in small amounts may add fibre — but only use if your vet agrees. It is not a substitute for treatment if your cat has not passed stool for 48 hours.

The full guide

Causes, symptoms, treatment options and when to call your vet — in the complete plain-English guide.

Frequently Asked Questions

Does wet food help cat constipation?
Yes — hydration supports normal stool. Many vets recommend increasing moisture through wet food, fountains, or broth added to meals as part of a management plan.
Can hairballs cause constipation?
Large hairballs can contribute to blockage, especially in long-haired cats. Regular grooming and hairball diets may help — ask your vet if constipation recurs.
Is pumpkin safe for constipated cats?
Plain cooked pumpkin in small amounts may add fibre — but only use if your vet agrees. It is not a substitute for treatment if your cat has not passed stool for 48 hours.

When it can’t wait, call your vet. Breathing difficulty, collapse or suspected poisoning need urgent advice.

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