A swallowed corn cob, cooked bone or stone-fruit pit can lodge in a dog’s stomach or intestine and block it completely. Corn cobs almost never pass on their own. If your dog or cat has eaten one, call an emergency veterinary team right away rather than waiting for vomiting to start, because an obstruction worsens quickly overnight.
Why Corn Cobs Are the Classic Summer Obstruction
Corn on the cob is everywhere in Abbotsford from July through September. Roadside stands, farm gates and backyard barbecues all put fresh Fraser Valley corn on the table, and the leftovers end up in a bin or on the lawn where a curious dog can reach them.
The trouble is the shape. A stripped cob is close to the exact diameter of a medium or large dog’s small intestine, it resists being broken down by stomach acid, and its rough surface grips the intestinal wall instead of sliding along it. Small dogs can be blocked higher up, in the stomach or esophagus. Larger dogs often swallow a cob whole and show nothing at all for the first several hours.
This is a scenario where emergency surgical services may be needed to remove the object before the intestinal wall is damaged. The cob itself is not toxic. The problem is entirely mechanical, and mechanical problems do not resolve by waiting.
Cooked Bones, Skewers and the Rest of the Barbecue Table
Cooked bones behave very differently from raw ones. Heat dries them out and makes them brittle, so rib, chicken and pork bones splinter into sharp fragments rather than crumbling. Those fragments can scratch the esophagus on the way down, wedge in the stomach outflow, or perforate the bowel further along. A large marrow bone can also become stuck over the lower jaw, which needs sedation to release safely.
Skewers deserve their own warning. Wooden and metal skewers are soaked in meat juices, they are swallowed fast and whole because the dog is chasing the flavour, and their length and rigidity make them one of the more serious objects an emergency team sees. Count your skewers before and after a barbecue.
Rich fatty trimmings and drippings are a separate concern. They will not block the gut, but a sudden load of fat can trigger digestive upset and abdominal pain that warrants an exam rather than a night of watching and hoping.
Peach Pits, Cherry Stones and Backyard Fruit
Abbotsford sits in the middle of stone-fruit country, and August is peak season for peaches, plums, apricots and cherries. Pits are smooth, hard, roughly spherical and completely indigestible, which makes them a textbook obstruction in small and medium dogs. Fallen fruit under a backyard tree is a particular problem because a dog can work through several pieces before anyone notices.
Avocado and mango pits belong in the same category. If your dog is a habitual scavenger, clear the yard before letting them out. On walks around Mill Lake Park and other picnic areas, keep an eye on what your dog is nosing through in the grass, because discarded cobs and pits are common there through the summer.
Corn Husks, Foil and Wrappers: The Ones Owners Forget
Corn husks, silks, foil, plastic wrap, butter wrappers and greasy paper towels rarely make it onto a hazard list, but they are pulled out of pets regularly. Husks and silks mat together into a fibrous wad that does not move well through the gut. Foil and cling film are eaten because of what is on them rather than what they are, and they can bunch up in the same way.
String and butcher’s twine from a roast are the most dangerous items on this list, especially for cats. A linear foreign body can anchor at one end while the intestine keeps trying to move the rest along, which concertinas the bowel and can cut into it. If you can see string or thread hanging from your pet’s mouth or rear, never pull on it. Keep your pet calm and come straight in.
Upset Stomach or Obstruction? The Signs That Separate Them
A mild dietary indiscretion usually looks like one or two episodes of vomiting or loose stool, after which your pet is bright, drinking, and interested in food again. An obstruction usually looks different, and these are the signs that warrant an exam:
- Repeated vomiting, particularly vomiting that returns every time your pet eats or drinks
- Unproductive retching or gagging with little coming up
- Straining with no stool, or only small amounts of liquid stool
- A tense, painful belly, or a dog who braces with the chest down and hindquarters up
- Drooling, repeated swallowing or pawing at the mouth, which can point higher up the tract
- Refusing food when your pet is normally food motivated
- Lethargy that deepens through the evening instead of settling
Early on, the two can look identical, and that is exactly why a phone call is worth making. If your dog is a deep-chested breed showing a swollen abdomen with unproductive retching, that pattern needs immediate attention as well, and our guide to bloat and GDV in dogs covers that separate emergency. Ongoing digestive concerns that are not urgent are handled through our daytime medical services team.
Why Waiting Overnight Is the Real Risk
An obstruction is a time-dependent problem. While the object sits in place, the intestine keeps contracting against it, pressure builds, and the blood supply to that segment of bowel can be compromised. At the same time your pet is losing fluid through vomiting and cannot keep water down, so dehydration sets in on top of everything else.
Deterioration very often happens between midnight and dawn, when a household is asleep and nobody is watching. Our doors are open through exactly that window. If something was swallowed at a barbecue on Saturday evening, the honest answer is that Sunday morning may be several hours too late.
Please do not try to make your pet vomit at home, do not give any human medication, and do not feed a meal to try to push the object through. Bring a matching cob or an identical skewer if you have one, since knowing the size and material genuinely helps. If you are unsure whether what you are seeing counts as urgent, our post on what counts as a pet emergency is a useful reference, and you are always welcome to phone and talk it through.
What an Emergency Workup Involves
The visit starts with history and timing: what was swallowed, roughly how much, how long ago, and what your pet has done since. That timeline shapes everything that follows. Next comes a physical assessment, including gentle abdominal palpation, hydration status, pain scoring and vital signs.
From there, imaging and lab work through our pet diagnostics service help build the picture. Radiographs show dense objects clearly, while corn cobs, husks and plastic are harder to see and may call for ultrasound, repeat imaging a few hours apart, or blood work to assess hydration and organ values. Our post on emergency veterinary diagnostics walks through that process in more detail.
What happens next depends on what is found. Some objects are small and smooth enough to be monitored with fluid support, others are retrieved endoscopically, and some require abdominal surgery. Any route involving sedation is supported by anesthesia and patient monitoring throughout. Whatever the findings, the team will explain what they are seeing and talk you through the options before anything proceeds.
Lowering the Odds at Your Next Abbotsford Gathering
- Put cobs, bones and pits straight into a sealed bag inside a bin with a locking lid
- Count skewers before and after cooking, and act on it if one is missing
- Ask guests not to share scraps and to keep plates off low tables
- Give your dog a settled spot indoors or on a long line while food is out
- Clear fallen fruit from under trees daily through peach and plum season
- Keep foil, wrap, husks and greasy paper towels off the lawn and out of reach
- Store roast twine and string well away from cats, who are drawn to it
Frequently Asked Questions
My dog swallowed a corn cob but seems completely fine. Do I still need to call?
Yes, call right away. Dogs commonly look and behave normally for six to twelve hours after swallowing a cob, because signs only begin once the object reaches a narrower section of intestine. Being seen early gives the team more options than waiting until vomiting and pain have already started.
Can a corn cob pass on its own?
It is uncommon, and it is not something to count on. Cobs do not soften in the digestive tract and their diameter is a poor match for the small intestine in most dogs. Very small pieces sometimes move through, but size and build both matter, which is why assessment rather than assumption is the safer approach.
Are raw bones safer than cooked bones?
Raw bones splinter less than cooked bones, but they are not risk free. They can still cause obstruction, fractured teeth and gum injuries, and large weight-bearing bones can lodge over the lower jaw. If you offer bones at all, supervise closely and remove anything chewed down to a swallowable size.
What about my cat and corn husks or string?
Cats are at particular risk from string, twine and thread, more so than from cobs. A linear foreign body can anchor at the base of the tongue while the rest travels on, which is a serious injury pattern. Never pull on any visible string, and bring your cat in promptly for assessment.
How do I know if it is just an upset stomach?
You often cannot tell from the outside in the first several hours, which is the honest answer. Mild upset tends to settle within a cycle or two with a bright, hydrated pet. Vomiting that repeats, a painful belly, or refusal of both food and water point toward a concern that needs an in-person exam.
Something Was Swallowed Tonight? Call Before You Wait
If a cob, bone, skewer or pit has gone missing at your barbecue and your dog or cat is the likely culprit, phone +1(604)-969-0911 on your way in and our overnight team will be ready when you arrive. Learn more about our emergency and foreign body care for dogs and cats in Abbotsford.
Published by the team at Abby Veterinary Hospital and Emergency.
This article is provided for educational purposes only and is not a substitute for an in-person veterinary exam, diagnosis or treatment. If you have an urgent concern about your pet, contact Abby Veterinary Hospital and Emergency or your nearest emergency veterinary hospital right away.
Abby Veterinary Hospital and Emergency
2388 McCallum Rd, Abbotsford, BC V2S 3P4
Phone: +1(604)-969-0911
Email: info.abbyer@gmail.com
Hours: Everyday : 12 pm – 8 am