If there is a foreign body in the dog's stomach, if it is not operated, it may cause intestinal obstruction, which will cause the dog to become depressed, have a loss of appetite, become weightless, and in severe cases may vomit blood in the stool, which is life-threatening. Therefore, if the dog accidentally eats a foreign object, you need to feed it some probiotics and then observe it for two days to see if the dog can excrete it on its own. If it cannot excrete it, it is best to take the dog to a pet hospital for surgery to remove it.