If your dog swallowed a cooked bone, corn cob, sock, underwear, toy, string, or any non-food object, call Burlington Veterinary Emergency Hospital (BVERH) at (905) 637-8111 or the Pet Poison Helpline at 1-855-764-7661 for triage. Some ingested objects pass through safely; others cause life-threatening obstructions or perforations. The decision depends on the object, your dog’s size, when it was eaten, and whether symptoms are present, and that decision belongs to a vet looking at imaging, not to a Google search. This guide walks through the highest-risk objects, the signs of intestinal blockage, and what to expect at the vet.
What to Do in the First 10 Minutes
- Identify exactly what was eaten. Type of object, size, quantity, material. Take a photo of a matching object if you have one.
- Estimate the time of ingestion. Vomiting induction is usually only effective in the first 1 to 2 hours.
- Note your dog’s weight and any symptoms (vomiting, abdominal pain, restlessness, drooling).
- Call BVERH at (905) 637-8111 or Pet Poison Helpline at 1-855-764-7661. Both 24/7. They will tell you whether to drive in immediately, induce vomiting, or monitor at home with specific watch criteria.
- Do not induce vomiting at home unless instructed. Sharp objects (cooked bones, sewing needles, glass) cause additional damage during vomiting. Large objects can lodge in the esophagus during vomiting and become a true emergency.
- Do not pull on a string visible from the mouth or anus. Linear foreign bodies can be anchored deep in the GI tract and pulling can cause internal damage.
- Drive to BVERH at 775 Woodview Road in Burlington if instructed.
The full Burlington emergency contact list and first-aid steps for other ingestion emergencies are on our pet emergency page.
The Highest-Risk Objects
Cooked bones
Cooked bones splinter. Raw bones (under direct supervision and appropriate size) are generally safer because they bend rather than fracture. Cooked bones become brittle. The worst offenders are chicken bones, pork chop bones, T-bone steaks, and rib bones. Risks include:
- Sharp splinters piercing the esophagus, stomach, or intestine
- Bone fragments lodging in the throat or intestinal narrowing
- Constipation from compacted bone in the colon
Action: do not induce vomiting at home. Call BVERH. Many small smooth pieces pass safely with a high-fibre diet and monitoring. Sharp pieces or large bones may need endoscopic removal or surgery.
Corn cobs
The textbook intestinal obstruction. Firm, indigestible, and exactly the size to wedge in the small intestine of medium and large dogs. Corn cobs are especially dangerous because:
- They do not show clearly on standard X-rays (radiolucent), so diagnosis often needs ultrasound or a contrast study
- Owners often do not realize the dog swallowed one
- They almost never pass on their own and almost always need surgery
Common scenarios: backyard barbecues, picnic leftovers, garbage day. If you know your dog ate a corn cob, treat it as an emergency even before symptoms appear. Surgery before the bowel becomes obstructed is faster, cheaper, and safer than surgery after a full blockage.
Socks, underwear, towels, and fabric
The classic puppy and Labrador foreign body. Fabric items can:
- Pass uneventfully in many cases
- Lodge in the small intestine and cause obstruction
- Bunch up and act as a partial obstruction with intermittent symptoms over days
Action: call BVERH. Imaging will tell whether the fabric is in the stomach (often retrievable by endoscopy or induced vomiting if recent) or has moved into the intestine (often requires surgery).
Linear foreign bodies (string, dental floss, ribbon, fishing line, pantyhose, tinsel)
The most dangerous category. One end anchors somewhere (often at the base of the tongue, or in the stomach pylorus) while the rest moves through the intestine. Normal intestinal motion pulls the bowel into accordion-like folds along the string. The string can then saw through the intestinal wall, causing multiple perforations.
Action: do not pull on a string you can see from the mouth or anus. Drive to BVERH immediately. Linear foreign body surgery is more complex and has higher mortality than other obstructions, but is highly survivable with prompt treatment.
Toys, balls, and rubber
Whole tennis balls, hard rubber toys, and Kong-style toys (intact, not pieces) are usually too large to pass and often need endoscopic or surgical removal. Soft chew toys can be torn into pieces small enough to swallow but large enough to obstruct.
Sticks and stones
Stick fragments can pierce the esophagus or intestinal wall. Stones (especially smooth river stones) can lodge in the small intestine. Both are surgical risks.
Coins and small metal objects
Pennies minted after 1982 contain zinc, which is toxic to dogs. A single swallowed penny in the stomach can cause acute hemolytic anemia within 24 to 72 hours, on top of the obstruction risk. Treat any swallowed coin as an emergency.
Batteries
Button batteries are a true emergency. They cause severe chemical burns within hours of being swallowed and can perforate the esophagus or stomach. Drive to BVERH immediately, do not induce vomiting (the battery can lodge in the esophagus and cause more damage).
Sponges, marshmallows, and absorbent materials
Items that swell when wet are a special concern because their size at the time of swallowing does not predict their size in the intestine. Memory foam, bath sponges, certain wound dressings, and dehydrated foods (uncooked rice, oats) can all expand significantly.
Symptoms and Timeline
Within hours of ingestion:
- Drooling, retching, or vomiting (esophageal obstruction)
- Pawing at the mouth
- Coughing or gagging
- Restlessness
12 to 72 hours after ingestion (intestinal obstruction):
- Repeated vomiting, especially after eating or drinking
- Lack of appetite
- Lethargy, withdrawal
- Hunched posture, reluctance to lie down
- Painful abdomen (resists touch, may yelp when picked up)
- Reduced or absent bowel movements
- Straining without producing stool
- Progressive dehydration
- Eventually, weakness, pale gums, collapse
A complete obstruction left untreated leads to bowel tissue death, perforation, peritonitis (infection of the abdominal cavity), and septic shock. The window from symptoms to fatal outcome is sometimes only 24 to 48 hours.
What the Vet Will Do
- History and physical exam. Abdominal palpation for pain, tenderness, or a palpable mass.
- Imaging. Plain X-rays for radiopaque objects (metal, bone, some plastics). Contrast study or ultrasound for radiolucent objects (cloth, corn cob, plastic). Sometimes endoscopy is used for diagnosis and removal in one step.
- Bloodwork to assess hydration, kidney function, electrolytes, and signs of sepsis.
- Treatment decision based on findings:
- Object in stomach, low-risk: induced vomiting or endoscopic retrieval. Often outpatient.
- Object in stomach, high-risk: endoscopy or gastrotomy (surgical opening of the stomach).
- Object in intestine, not obstructing: sometimes monitored with serial imaging to see if it passes. Surgery if it does not progress in 24 to 48 hours.
- Obstruction: emergency exploratory laparotomy with enterotomy (opening the intestine) or resection (removing damaged segment).
- Perforation or peritonitis: emergency surgery plus aggressive IV antibiotics and ICU support.
Cost: endoscopic retrieval typically runs $1,500 to $3,500. Foreign body surgery typically runs $3,500 to $7,000. Surgery with resection or peritonitis treatment can exceed $10,000.
Prevention
- Cooked bones go directly in a sealed outdoor garbage bin, never the kitchen trash where a counter-surfer can reach them.
- Corn cobs the same. Wrap and put outside before the dog gets near them. This includes BBQ aftermath and picnic cleanups.
- Train a strong “leave it” cue early. This is the single most useful command for foreign body prevention.
- Pick up socks, underwear, and small towels from the floor, especially if you have a Lab, retriever, or sock-obsessed puppy.
- Supervise chew toys. Replace toys when they start to fragment.
- Keep tinsel, ribbon, dental floss, and sewing kits in closed containers. Linear foreign bodies are the most dangerous category.
- Keep small kids’ toys with magnets or batteries off the floor. Multi-magnet ingestions and button batteries are both extreme emergencies.
- Save BVERH (905-637-8111) in your phone now.
The complete Burlington emergency resource list is on our pet emergency page.
Foreign body ingestion is one of the most variable emergencies in vet medicine. Some objects pass uneventfully; others require complex surgery within hours. The decision belongs to a vet looking at imaging, not to a Google search or a forum thread. The most important thing you can do after your dog swallows something is call (905) 637-8111 and let the vet decide whether to act now or wait and watch.