Dogs will have a variety of symptoms after eating foreign bodies by mistake. Generally speaking, the severity of symptoms is related to the type and quantity of foreign bodies eaten by dogs by mistake and the degree of damage to organs such as mouth and gastrointestinal tract. The following are common symptoms:

1. Vomiting: Dogs often vomit after eating foreign objects by mistake, and the vomit may contain foreign objects or blood.

2. Diarrhea: Dogs often have diarrhea after eating foreign bodies by mistake, and there may be foreign bodies or blood in the feces.

3. Dyspepsia: Some dogs will have indigestion after eating foreign bodies by mistake, such as loss of appetite and anorexia.

4. Abdominal pain: Some dogs will have abdominal pain after eating a foreign body by mistake, which is manifested as whining and pressing the abdomen.

5. Esophagus, stomach, intestine and other organs are damaged: most foreign bodies may be stuck in the esophagus, stomach or intestine of dogs, causing organ damage, such as rupture and bleeding.

In short, after a dog eats a foreign body by mistake, the owner should take it to the hospital in time for corresponding treatment. If the above symptoms appear, especially vomiting blood, diarrhea and blood, they need to be treated in time to avoid causing more serious diseases. In addition, the owner should strengthen the management of dogs and try to avoid dogs eating foreign objects by mistake.