Dog Constipation

If your dog is straining, passing hard stools, or not pooping as usual, it’s understandable to worry. This page will help you understand common causes of constipation in dogs, what you can try at home, and when it’s time to call a vet.

Talk to a vet

When to call a vet for dog constipation

Emergency

Go to the ER now

● Your dog is straining repeatedly and cannot pass stool at all, especially if the belly looks swollen or painful.
● Constipation is happening along with repeated vomiting, severe lethargy, collapse, or marked weakness.
● You suspect your dog ate a bone, toy, corn cob, fabric, kitty litter, or another foreign object.
● Your dog is crying out, seems in severe pain, or you notice signs of shock or distress.
● There is a protruding rectum, significant bleeding from the rectum, or black, tarry stool.

Urgent

See a vet within 24 hours

● Your dog has gone more than 48 hours without a bowel movement or is repeatedly passing only tiny amounts.
● Your dog is straining or appears painful when trying to poop.
● Stools are very hard, dry, or pebble-like.
● Constipation keeps coming back, or your dog is a senior dog with new bowel changes.
● Your dog also has decreased appetite, mild vomiting, scooting, or discomfort around the rear end.

Monitor

Watch at home, call if it worsens

● Your dog is bright, eating normally, drinking, and acting comfortable, but had one mildly hard stool.
● There was a recent diet change or mild routine change and your dog is otherwise acting normal.
● Your dog missed one usual bowel movement but is not straining and has no vomiting or abdominal pain.
● The constipation seems mild and started within the last day.
● You can monitor closely for worsening signs while making sure fresh water and normal activity continue.

Common Causes of Dog Constipation

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Diet or low fiber intake

A diet that does not suit your dog, sudden food changes, or low-fiber intake can contribute to hard stools. Bones and high-calcium items can also make stool difficult to pass.

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Eating things they shouldn't

Dogs may swallow hair, toys, rocks, fabric, kitty litter, or bones. These can slow stool movement or cause a dangerous blockage.

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Dehydration

When a dog is dehydrated, the colon pulls more water from stool, making it harder and drier. This can happen with illness, poor water intake, or fluid loss.

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Too little exercise

Sedentary dogs may have slower bowel movement transit. Regular activity often helps support normal defecation.

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Pain, anal sac, or pelvic problems

Pain near the rear end, anal sac disease, prostate enlargement, or narrowing of the pelvic canal can make defecation difficult or painful.

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Underlying disease or medication side effects

Constipation can be linked to metabolic disease, neurologic problems, spinal disease, or medications such as some pain medicines, diuretics, antihistamines, antacids, and certain cancer drugs.

What to Do at Home

Mild constipation may improve with hydration, exercise, and avoiding anything that could make stool harder to pass. If your dog seems painful, keeps straining, vomits, or you think there could be a blockage, call your vet promptly rather than trying home remedies on your own.

Make sure your dog has constant access to fresh water and encourage normal drinking.
Take your dog out for gentle walks if they feel up to it, since movement can help bowel motility.
Do not give human laxatives, enemas, suppositories, or stool softeners unless your veterinarian specifically tells you to.
Do not keep offering bones, chews, table scraps, or anything your dog could have trouble digesting.
Monitor for red flags such as vomiting, abdominal swelling, severe straining, lethargy, blood, or no stool for more than 48 hours.
If constipation is mild and your dog otherwise seems normal, call your vet for guidance before adding fiber or making major diet changes.

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Frequently asked questions about dog constipation

What are the signs of constipation in dogs?

Common signs include not pooping for a day or two longer than usual, repeated straining, passing very small amounts, and hard, dry, pebble-like stool. Some dogs also seem uncomfortable, may pace, hunch, scoot, or lose interest in food.

How long can a dog go without pooping before it is serious?

If your dog has gone more than 48 hours without a bowel movement, or is straining and cannot pass stool, it is a good idea to call your veterinarian. It is more urgent if vomiting, lethargy, belly pain, or bloating are also present.

Can dog constipation go away on its own?

Mild constipation sometimes improves with hydration, exercise, and time, especially if your dog is otherwise acting normal. But constipation can also be a sign of dehydration, pain, anal sac problems, obstruction, or other underlying disease, so persistent or recurrent cases need veterinary attention.

What should I do if my dog is straining but nothing comes out?

Call a veterinarian as soon as possible. Straining without producing stool can happen with constipation, but it can also be seen with urinary problems or intestinal obstruction, both of which can become emergencies.

What causes constipation in older dogs?

Senior dogs may be more prone to constipation because of decreased activity, dehydration, pain, neurologic disease, pelvic or prostate issues, or side effects from medication. New constipation in an older dog should be discussed with a vet.

What can I give my constipated dog at home?

For mild constipation, the safest home steps are making sure your dog has fresh water, encouraging gentle exercise, and avoiding bones, chews, and table scraps that could make stools harder to pass. Do not give human laxatives, enemas, suppositories, or stool softeners unless your veterinarian specifically recommends them. If your dog is straining, seems painful, is vomiting, or has gone more than 48 hours without pooping, contact a veterinarian.

Looking for home remedies?

For mild constipation, see our step-by-step home treatment guide.

Dog Constipation Home Remedy →

Sources

Disclaimer: The information provided in this article is for educational purposes only and does not constitute veterinary medical advice. Reading this content does not establish a veterinarian-client-patient relationship. Every pet is different — always consult a licensed veterinarian before making decisions about your pet's health, diet, or care. If you'd like personalized guidance, you can talk to one of our vets. If your pet is experiencing a medical emergency, contact your local emergency animal hospital immediately.

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