If a dog swallows a fishhook and gets stuck in its internal organs, it may die within 1 to 3 days. If it pierces the internal organs, the fishhook may be dissolved by the gastric juice, and then it will not die, so the specific situation depends on the actual situation of the dog. When it is discovered that a dog has accidentally eaten a fishhook, the dog must be sent to the pet hospital for examination in time to confirm whether surgical treatment is needed to avoid delaying the condition and risking life.