Dogs cannot eat onions. Because onions contain n-propyl disulfide, a substance that is toxic to dogs, it can oxidize hemoglobin in red blood cells, produce Heinz bodies, rupture red blood cells, and cause hemolytic anemia. After dogs ingest onions, they may experience symptoms such as depression, loss of appetite, vomiting, diarrhea, and blood in the urine.

In addition, onions are foods with a pungent smell, which will affect the sensitivity of the dog's sense of smell after being exposed to them. Therefore, it is best not to feed dogs food with human flavorings or pungent odors in daily life.

How to handle a dog that mistakenly eats onions:

1. It is necessary to stop the dog from continuing to eat onions in time. If the dog eats a small amount of onions, , there is no reaction, you can give some water and observe. Maybe the dog ate not much onions, and there is no poisoning.

2. If the dog has symptoms such as vomiting, diarrhea, convulsions, drooling, etc., it needs to be taken to the pet hospital for treatment in time. The pet owner should tell the doctor when the dog ate the pet and how much it ate, and take photos of the dog’s hematuria and vomitus for the doctor’s reference. These may help the doctor save the dog’s life.

3. You can feed a little vitamin E to protect hemoglobin and prevent the formation of Heinz bodies. You can also inject vitamin B12 intramuscularly.