Intestinal Blockage in Dogs: Signs, Timeline and What to Do

A swallowed sock, toy or corn cob can block a dog's gut while the dog still seems fine. Learn the signs, the timeline and when to go in.

Quick answer: Repeated vomiting, refusing food, belly pain, lethargy and straining with little or no stool are the main signs of an intestinal blockage in dogs. A dog can seem fine at first, so if your dog may have swallowed a sock, toy, corn cob or bone, go in person now for X-rays; anything sharp, a battery or string means the ER now. Don't make your dog vomit at home.

This article is general information, not a diagnosis. If you think your pet is in danger, go to the nearest emergency animal hospital.

Go to an emergency vet now if you see these signs

A dog that swallowed or may have swallowed an object needs an emergency vet now if it vomits, retches with nothing coming up, stops eating, has a swollen or painful belly, or seems weak, and a swallowed battery, sharp object or string means the ER now even with no signs. A dog that got into trash or leftovers and vomits more than once also needs an emergency vet now, and if the trash held bones, corn cobs, twine, skewers or foil, treat it as a possible swallow.

Also go now for:

• Belly pain: a hunched back, the prayer position (front legs down, rear end up), or biting or growling when the belly is touched.
• Dry heaving or retching with nothing coming up, a swollen or tight belly, restlessness or drooling, especially in a large, deep-chested dog, which can also be bloat (see dog bloated stomach and not eating).
• Straining with little or nothing coming out, or water that won't stay down, even small sips.
• Pale, white or gray gums, weakness, collapse, fast breathing, a fever or a body that feels cold, blood in the vomit (red or like coffee grounds) or black, tarry stool.
• Drooling, gagging, repeated swallowing or bringing food back up after a bone, rawhide or chew, or string under the tongue or at the rear (don't pull or cut it).

Even with no signs, tinsel, a penny, expanding glue, a magnet or water beads also mean the ER now, and a sock, toy, corn cob, cooked bone, fruit pit, rock or hair tie means in person now: your own vet if they can see your dog right away, otherwise an emergency vet.

A puppy with diarrhea that starts vomiting, has belly pain or turns dull needs a vet now (the ER if your vet can't see the puppy right away), because the Merck Veterinary Manual says the gut can telescope into itself after parasites, parvovirus or a swallowed object.

If the object may be toxic, call a poison line on the way: ASPCA Animal Poison Control at (888) 426-4435 (a consultation fee may apply) or Pet Poison Helpline at (855) 764-7661 (a per-incident fee applies).

Signs of a blockage in dogs

The Merck Veterinary Manual lists vomiting, loss of appetite and lethargy as the usual signs of an intestinal blockage in dogs, along with belly pain, belly swelling, diarrhea, fever or a low body temperature, dehydration and shock. In a 72-dog case series from Naples, Italy (Di Palma and colleagues, Animals, 2022), 82% of dogs vomited and 57% had belly pain.

Merck says vomiting may be less common when the blockage is farther down the small intestine, so little vomiting is not reassurance. Large, round objects often cause a complete blockage, while string-type or small objects more often cause a partial one, in which some stool can still pass and signs come and go.

Merck says young large-breed dogs are more likely to have a blockage, but small dogs are not exempt: 22% of the Naples dogs weighed under 9 kg (about 20 pounds).

How long after swallowing something do signs start?

Blockage signs in a dog can show up soon after swallowing or come and go for days with a partial blockage, so a dog that seems fine the first night is not in the clear. The Merck Veterinary Manual says a dog with a blockage can have a normal physical exam, and Cornell University's College of Veterinary Medicine described a dog whose swallowed stick caused no clear signs until it perforated the small intestine.

After a swallow, or a possible one:

What you see	Why it matters	Do this
Seems fine	Can still be stuck	In person now
Any vomiting	Often upper gut	ER now
On-and-off vomiting	Can be partial	ER now
Straining, no stool	Can be blocked	ER now
Dry retching, big belly	Bloat or block	ER now
Pale gums, weak	Possible shock	ER now

In person now means your own vet if they can see your dog right away, otherwise an emergency vet. In the Naples series, vomiting for more than 24 hours before treatment was linked to a worse outcome, so don't wait to see if an object passes.

Will a dog still poop with a blockage?

Yes, a dog with a blockage can still poop: in a 72-dog study (Di Palma, Animals, 2022), only 31% had stopped passing stool, so normal stool or diarrhea does not rule a blockage out. In World Small Animal Veterinary Association (WSAVA) 2018 proceedings, Lorrie Gaschen of Louisiana State University wrote that partial blockages tend to cause a longer course of on-and-off vomiting and diarrhea.

Straining with little or nothing coming out, which VCA Animal Hospitals lists among blockage signs, means an emergency vet now; it can also be a urinary blockage. Don't give laxatives, oil or an enema.

Which swallowed objects are most dangerous

Dogs typically swallow socks, underwear, toys, pacifiers and corn cobs, according to a Cornell University veterinary surgeon, and batteries, sharp objects, string, pennies and expanding glue are emergencies even with no signs. Veterinarians at the ASPCA Animal Hospital say corn cobs top their list. In the Naples series, children's toys (14%), metal objects or coins (13%) and cloth (13%) led the list. The Merck Veterinary Manual says swallowed objects usually can't be digested (plastic, rocks) or digest slowly (bones).

Object	Extra risk	Do this
Sock, cloth	Common cause	In person now
Toy, squeaker	Won't digest	In person now
Corn cob	Top culprit	In person now
Cooked bone	Can injure gut	In person now
Fruit pit	Can block gut	In person now
Rock	Won't digest	In person now
Foil, wrapper	Food inside	In-person vet today
Battery	Can burn	ER now
String, ribbon	Can cut gut	ER now
Needle, hook	Sharp	ER now
Penny	Zinc poison	ER now
Expanding glue	Expands	ER now

Any vomiting, not eating or belly pain with any of these means the ER now. If a wrapper held sugar-free gum, mints, candy or chocolate, call a poison line or go to an emergency vet now instead of waiting for a same-day visit. Don't make your dog vomit for any of them.

String, ribbon and tinsel. The Merck Veterinary Manual says string-type objects carry a higher risk of perforating the gut and that pulling a string can cause a perforation, so never pull or cut string seen under the tongue or at the rear. See dog ate string, tinsel or ribbon.

Batteries, pennies and glue. Pet Poison Helpline says swallowed batteries can burn the esophagus or gut, and the Merck Veterinary Manual names US pennies minted since 1982 as a key source of zinc poisoning. Pet Poison Helpline also warns that some construction and wood glues expand once swallowed and can cause a blockage.

Should I make my dog throw up? What not to do at home

Don't make a dog vomit at home after it swallows an object: Pet Poison Helpline warns that a sharp or large object can get stuck or damage the esophagus on the way back up, so only a vet or a poison line should decide. It also warns against it after batteries; see when making a dog throw up helps or harms.

• Don't reach down the throat, and don't pull or cut string.
• Don't give bread, pumpkin, oil, fiber, laxatives or an enema to push an object through, and don't withhold water as home care.
• Don't give leftover anti-nausea tablets or any human stomach, antacid or anti-diarrhea medicine to a dog that may be blocked; the FDA-approved label of a common canine anti-nausea tablet says its safe use has not been evaluated in dogs with a gut blockage, and home treatment can hide a dog that is getting worse. Whether any medicine fits is a vet's call after an in-person exam.

Bring the packaging or a photo of the item and say roughly when your dog ate it; the Merck Veterinary Manual notes many dogs keep eating objects after a past episode, so mention any history.

How a vet diagnoses and treats a blockage

A vet usually diagnoses a blockage in a dog with X-rays, often adding ultrasound, and the Merck Veterinary Manual says an object still in the stomach may be removed with an endoscope, while one past the stomach usually needs surgery. Contrast X-rays help find objects that don't show on plain film, and the American College of Veterinary Surgeons (ACVS) adds that some dogs need a CT scan. A clear first X-ray doesn't always rule out a blockage, because plain X-rays can miss wood, cloth and some plastics.

Merck recommends removing most swallowed objects found on X-ray because they can block or perforate the gut, and says an endoscope should not be used when a string-type object is suspected. In the Naples series, 68% of objects were still in the stomach, an endoscope removed 56% of all objects, and every dog whose object was removed from the stomach survived. ACVS says the prognosis after surgery is usually quite good.

After stomach or intestinal surgery, call the surgeon or go to an ER now for any vomiting, or a worse appetite, lethargy, fever, a draining incision or a swelling belly in the first 5 days, because ACVS says a leak can happen in that window.

How long can a dog live with a blockage?

No one can give a safe number of days a dog can live with an intestinal blockage: VCA Animal Hospitals says a blockage often compromises blood flow to the gut, and tissue can die if blood flow is interrupted for more than a few hours, which an owner can't see from home. The Merck Veterinary Manual says an untreated dog can die from shock caused by fluid loss within a short period, and that dogs treated quickly tend to do well.

A partial blockage buys no safe time: in 208 dogs and cats (Hayes, Journal of Small Animal Practice, 2009), partial and complete blockages had similar survival, and a longer time with signs before treatment was linked to more deaths.

Holiday risks and how to prevent the next one

Thanksgiving and Christmas add corn cobs, turkey bones, roast twine, foil, grease-soaked paper towels, gift ribbon, tinsel, new toys and stocking stuffers to the socks dogs already swallow. Thanksgiving is Thursday, Nov. 26. Roast twine, gift ribbon, tinsel, and skewers or toothpicks from the roast mean the ER now, even with no signs; don't pull string you can see.

• Turkey bones: in person now, even if your dog seems fine (the ER now with any vomiting, not eating or belly pain); the ASPCA says swallowed bones can injure or block the gut; see turkey bones and leftovers.
• Aluminum foil, a food wrapper or a grease-soaked paper towel: an in-person vet today, or the ER now with any vomiting, not eating or belly pain; see grease, butter and pancreatitis.
• Diarrhea after leftovers, with no chance of a swallowed object: see diarrhea after table food.

ACVS suggests a room or crate with no loose objects when a dog that swallows things is unsupervised, and a basket muzzle for repeat swallowers, since repeat belly surgery gets riskier if adhesions form. Keep laundry and toys behind closed doors, use a locking trash can, and put twine and corn cobs straight into an outside bin.

When a video visit helps

A video visit cannot diagnose or rule out an intestinal blockage in a dog, because it can't see inside the gut the way X-rays and ultrasound can, so a dog that may have swallowed an object needs to be seen in person now. If a sock, toy piece or anything else is missing, go even if your dog is eating, pooping and acting normal; waiting can cost the chance to remove it from the stomach.

A video visit with a licensed RexVet vet can help when a bright adult dog that could not have swallowed an object or toxin had one soft stool or one vomit, keeps water down, and has a soft belly and normal breathing. It can also help after blockage surgery if you can't reach the surgical clinic or its after-hours line and your dog is alert, eating as expected, not vomiting and has a dry incision: the veterinarian can go over the discharge sheet, cone, feeding and activity limits alongside the surgeon's plan, not instead of it.

RexVet is a 501(c)(3) non-profit. A $64.99 live video visit is with a veterinarian licensed in your pet's state (Florida, New York or Virginia), with your pet located there during the visit, in live slots from about 8 AM to 11 PM ET; a same-day slot is not guaranteed. Outside those hours, if no slot is open, or if anything is getting worse, go to an emergency vet. On camera, the veterinarian can check energy, posture, breathing, gum color and belly shape and tell you whether to go in now, but they can't take X-rays, run an ultrasound, feel the belly, give fluids or operate. No prescription is promised; the state limits are in the FAQ below.

Book a live video visit

Need an Expert Opinion on This Topic?

Book a video visit with a licensed vet, evenings and weekends included

See open times

Licensed Veterinarian

Secure Video Calls

Frequently Asked Questions

How long does it take a dog to pass a sock?

Don't wait for a sock to pass: get your dog seen in person now for X-rays, even if your dog acts normal. A sock isn't a small, smooth object and may never pass, and neither may a toy, corn cob or bone; a vet may be able to remove it while it is still in the stomach, before it moves into the intestine. Go to an emergency vet now if your dog vomits, stops eating, has belly pain or seems dull.

Can a dog pass a blockage on its own?

Not safely at home: the Merck Veterinary Manual recommends removing most swallowed objects found on X-ray. Some small, smooth objects do pass, and a vet may watch one in a stable dog with repeat X-rays; Merck says to remove it if it hasn't passed in 36 to 48 hours, stops moving or the dog gets worse. Even during that watch, Merck says continued vomiting, depression or lethargy means surgery right away. That is hospital X-ray monitoring, never a wait at home.

Will a dog drink water with a blockage?

It may, so drinking doesn't rule out a blockage; water that comes back up, even small sips, means an emergency vet now. A dog that drinks normally after a possible swallow still needs to be seen in person now. The American College of Veterinary Surgeons lists dehydration among the signs of a swallowed object. Don't take water away as home care.

What does dog vomit look like with a blockage?

No single look confirms a blockage: any vomiting after a possible swallow, or more than once after trash or leftovers, means an emergency vet now. Blood in the vomit (red or like coffee grounds) or retching with nothing coming up means the ER now; retching with a swollen belly can also be bloat.

My dog ate a toy but is acting normal, what now?

Get your dog seen in person now, even if acting normal: your own vet if available right away, otherwise an emergency vet. A toy still in the stomach may be removable with an endoscope before it moves on. Bring the packaging or a photo; if the toy had a battery, magnets or sharp parts, go to the ER now.

Can an online vet tell if my dog has a blockage?

No. A suspected blockage needs X-rays or ultrasound in person; video fits only when no object could have been swallowed. For a pet located in Florida, New York or Virginia, a licensed RexVet vet can check your dog on camera and tell you whether to go in now, but X-rays, ultrasound, a hands-on belly exam, IV fluids, an endoscope and surgery all need an in-person or emergency vet. No prescription is promised. If medicine comes up for something else: in Florida (s.474.2021), a prescription after a video-only visit is limited to FDA-approved animal drugs used as labeled, for up to 14 days (1 month for products labeled only for fleas and ticks), with no renewal without an in-person exam; human-labeled drugs, controlled drugs and compounded antibacterial, antifungal, antiviral or antiparasitic drugs need an in-person exam. Federal rules require an in-person exam before any vet prescribes a human or off-label drug. In Virginia, the exam behind a prescription may be done electronically, but the veterinarian still decides whether video is enough. New York's rules for veterinary video care, including prescribing, are not settled, so a visit there may cover less. RexVet is not a pharmacy; a pharmacy transfer fee applies if a prescription is sent to an outside pharmacy.