Socks

dog severe

Go to the vet immediately — don't wait for symptoms.

Hazard: Whole socks are a leading cause of intestinal obstruction in dogs, especially small and medium breeds — most modern fabrics don't break down in the stomach, and a lodged sock can cut off blood supply to the intestine. Symptoms (vomiting, loss of appetite, lethargy, abdominal pain) can take 12-72 hours to appear, so a dog can look completely normal right after swallowing one even as a blockage forms underneath.
Notes: Don't wait to see if it passes on its own. If you saw or strongly suspect your dog swallowed a sock, call a vet immediately — caught early (before it leaves the stomach), it can sometimes be retrieved by inducing vomiting or endoscopy instead of surgery.

Source: VCA Animal Hospitals; VEG ER for Pets; Cornell University College of Veterinary Medicine · view original