How long after swallowing a foreign object can a dog pass it?

A dog usually passes a swallowed foreign object in about 2-3 days, but this only applies to relatively small objects. If the object is sharp, take the dog to a vet for endoscopy promptly and remove it surgically if needed, to avoid damage to internal organs or infection.

If the dog has not passed the object 3 days after swallowing it, the owner should take it to a hospital for a check-up.