Cat Constipation: Signs & When to Worry
Veterinary references checked with PetHealth+ · Last reviewed June 2026
By Kaiser Khan , Founder Veterinary references checked with PetHealth+ ( process ) Last reviewed Cite this page How we research & review
Straining in the litter box without passing stool for over 48 hours needs vet care. Obese and senior cats are at higher risk — megacolon can develop if ignored.
Signs
Small hard faeces, straining, vomiting, loss of appetite.
Causes
Dehydration, obesity, arthritis limiting posture, and pelvic injury.
Obstipation
Complete blockage is painful and may need enemas or surgery.
Related: Cat litter box problems · Kidney disease in cats
Frequently asked questions
Does wet food help constipation?
Yes — hydration and fibre support normal stool.
Can hairballs cause constipation?
They can contribute — grooming and diet management help.
Is pumpkin safe for cats?
Plain pumpkin in small amounts may help — ask your vet first.
When is constipation an emergency?
Vomiting, bloating, and no stool for 48+ hours — urgent care.